Basic trigonometry | Basic trigonometry | Trigonometry | Khan Academy
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- čas přidán 14. 02. 2011
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Introduction to trigonometry
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Trigonometry on Khan Academy: Big, fancy word, right? Don't be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry ("trig" as it's sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It's used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It's not only space, however. Trig is present in architecture and music, too. Now you may wonder...how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you'll learn the answer from us in these tutorials!
About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.
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Who else is here because they are completely lost in class
Everyone
Literally everybody here
Kirishima I’m in 8th grade idk what you’re learning in 8th but none of the other kids are learning this
Kirishima other kids in my school and calm down I’ll just delete the message
czcams.com/video/SI9sLS8p2zw/video.html
I like how he starts to sound more agressive as the video goes on
lolol
He sounds more simple and intenser...
…
Lollll
you took 9 minutes and 16 seconds to explain this while my teacher took nearly 2 months to explain
Kai Miner your teacher was probably consuming the time with nonsense
+Kai Miner Teachers r overrated
Bill 'I Did Not Bang That Woman' Clinton yes I did
lol
Same
is anyone still watching this 13 years later?
yes
Yes
most definitely, its extremely useful
the main thing is the quality
"I wish I were high on potenuse"
Demon50 😃 Bazinga
Badum....tssss
Can I get a t shirt with that on it?
BigTCDD That's a damn good idea. 👍😎
It's a sketch from key and peele lol
anybody else here trying to save there grade before finals
Me. The exam is tomorrow😂 tryna learn like 2 days worth of class in 10 mins
Me!
Me!
I am trying to learn 2 years of class in 10 minutes
+ZanderDogz your crazy men
learned more from this dude than i did in 3 classes, 1 hour and a half each.. thanks mr.bullock
I've learned more using Khan Academy than I ever did in school.
Well who's here to save themselves from online school 🤚
Yep... before this video I couldn't understand a word that my teacher was saying
@@google8993 soo truee. This made my math life easier 😂
This is a part of my online school :)
@@asairayn Goodluck then :)
I know maths more intuitively
Let the Trigonometry ritual begin: *SOH CAH TOA, SOH CAH TOA, SOH CAH TOA!!!*
SOH CAH TOA!!!!!!!!
SOH CAH TOA!!!!!!!!
SOH CAH TOA!!!!!!!!!!!
SOH CAH TOA!!!!!!!!!!!!!
SOB CAH TOA HAH😂😭
Its amazing i am a 10 grade dropout that made C's, D's and F's in math, i could never retain what teachers where trying to teach in school with chalk bored methods, it would take me weeks to drill much more basic mathematics than this into my head using typical teaching methods but i pretty much retained and understand everything in this video in 9 minutes at worst watching it 1-2 more times would be perfect. Its amazing with videos like this i could learn everything from 1st-12th grade and on into collage level in less than a year by these standards i only wish i was about 10 years ahead so i could have had access to this stuff when i needed it most, textbooks and teachers did not cut it for me all i needed was the ability to have problems visualized in front of me in a clean simple manner at a pace i can handle with the ability to pause, rewind as i please. And i know i must not be the only person that was like myself that has found this way to be ten times more effective.
Exactly what I has been thinking about. I hated my math teacher and actually this hatred was mutual. And the same was in college. Now after about 4-5 years of not doing math at all and feeling an instant urge to learn things with this guy explaining everything so cheerfully I have eventually learnt a lot of things that I could not comprehend earlier in my life even in my native language
Vadim Shakin my math teacher was also terrible. my class can't understand him due to his poor use of the English language.
my teacher actually showed my class this channel
DID YOU GUYS REALLY READ THE WHOLE THING?!?!?!?!?!?!?!?!?!?!
@@happyyadav6950 yea...
75 minutes of my life wasted, 10 minutes of my life worth it! Thanks dude!
lol
Why dont you become my Maths teacher??
You taught me the whole thing in 18 minutes.I couldnt understand what my teacher is saying which took more than 3 months!!!
George Clarke
Badar Ismail same
Hello,
I provide the homework solutions in a very detailed manner on my WhatsApp group...if you need help regarding your school homework please WhatsApp me on 7827815929
Yo you know you in class the teacher be talking but it's like everything she said just come through one ears and reach the next
This guy is a genius.
+George Costanza this is nothing
Aweou awe I mean he is good at explaining things, not that I'm amazed by the depths of basic geometry.
George Costanza oh i see, yeah hes good at explaining it
+George Costanza COSTANZA!!!!!!!!!!!!!!!!
ikr
Shoutout to my brain for forgetting basic trig the night before the SAT
give us an update
Sejal I. Whoops! 1300 total, 680 reading 620 math. I jumped ship to the act this February and got a 33 composite with a 30 on the math section and a 34 on everything else
Katie Jones oh nice!
Sejal I. Thanks!!
@@katiejones4596 how to be like u
People studying this for their schoolwork... Meanwhile I'm here trying to figure all this out for my career in game development.
I'm here as a 13 year old trying learn calculus and later on quantum mechanics because I love stuff like this. Also maybe it'll be easier in the future. /:
lol.... You dont really need to know all of this for game development. I a game designer soooo... lol. However this knowledge does not hurt. I would say focus your attention to other areas in game development if you are new.
new? no. Trying to get a backend position for a game engine? yes.
nice :D. Hope things work out well for you :D
Its way too early for you to study calculus mate, stick with your middle school math nad later on highschool math. If u do it right, caclulus will be a piece of cake! Good luck :)
"its not that complicated"
*the playlist is 4+ hours long
I learned more about trigonometry in this video than i did in math class.
+kyle john Meth*
what grade do you start to learn trigonometry?
@@pizzaplease6890 depends on what class u take, u learn it in geometry first
you have like one of the best lesson tutorials here in YT, you're a life saver to be exact
Khan, you are such a good teacher! I have felt good at math and now have confidence. The way you explain, use colors, and write out is helping perfectly.
I sat through this whole video despite knowing almost all of this. Amazing. Very easy to understand, clear, helpful...
9 years later and people still use this video
This is super helpful. My professor jumped right into functions and I didn't even know what they really represented.
i have easy formula for this "some people have curly brown hair through proper brushes"
s=p/h c=b/h t=p/b
p=perpendicular b=base h=hypotenuse
s=sin c=cos t=tan
my sir told me the same but i forgot ty!
Can't express in words just how incredibly well you described this formula to me, has given me a great understanding of trigonometry, thank you.
PERFECTLY EXPLAINED! Good job man, you helped me in 9 minutes better than my teacher did in one semester.
Imagine if you had not followed your purpose to be such a blessing and great help to millions around the world...Thank you for the work you and your team continue to do.
i cried reading this
These are such a big help! I transferred schools and I was handed a bunch of work just to make up, and the teachers are helpful, but none of it made sense! Thank you so much!
Soooo happy this course is online, I need to take a calculus class and I have never even taken trig so I really need this
I actually knew how it worked, also I could solve the questions but I still thought that it would better if I had listen to you once, and it was as I thought. You amazingly can explain the complex information in simple form.
@intelincorporation LOL! Good one! I was taught:
SOH CAH TOA
Some Old Hippie - Caught Another Hippie - Trippin' On Acid.
:D
Public education at its best...thnx for sharing [and to all who do a similar thing]
Thank you for all that you do. Such a positive impact you have made on education.
12 YEARS LATER AND IT STILL HITS THAT SPOT🔥
thank you so much for uploading these, i studied chemistry and got an A+ thanks to your videos, i hope i will get a good mark from math too bcs my teacher doesn't want to practice with us and we have to do everything alone :( your videos are so helpful you have no idea
I went back to your videos from 2007 and I can see the great improvement Mr. Khan has made making his videos
Keep it up, online class and school cannot be compared to the great and easy classes you guys give for free, thank you guys alot
fun way for remembering SOH CAH TOA-
"some old hippie caught another hippie tripping over apples"
Anyone here during Quarantine?
yep
This is so helpful. I’m doing online learning and geometry is the hardest of them all. Thanks for making this easier for me and others.
This explaination is full easily to understand. thank you so much.
S-some
O-old
H-horses
C-can
A-always
H-hear
T-their
O-owners
A-approach
This helped me to remember when I have to use sin,cos or tan.
trash
@@SalmanAli-wq9yt To you, not me.
You could also say.
And this way is easier too.
.......
(Some =people/have )
(Curly =brown/hair )
(Through = proper brushing )
*for*
Sin =perpendicular/hypotenuse
Cos =base/hypotenuse
Tan =perpendicular/base
Woah
I understood more in 10 minutes in a different language than I did in my mother language in about 4 hours. I even had the video sped up to 1.5. Very very well done. Thank you!
Great job, I like the way you explained each problem. Thank you for dedicating your time to help others.
That moment I learned more on khan academy then my teacher complaining at how their students should already know this because they showed one exampl
The pain of studying for the ACT when you haven't even reached Trig yet...I think you have just saved my life, good sir.
Like many who have said it before, you did more with 18 minutes than any of my teachers ever could have. Tip of the hat to you good sir! I say thank you. Also, have you considered using physical shapes to outline/trace around for accurate & quick drawing (assuming you're using a stylus pad)? Just a thought that crossed my mind. Regardless, thank you for your time. It's much appreciated and valued!
I was so afraid of the term trigonometry,but ...hey now I'm loving it!!!!
In my native language the analogue of "soh cah toa" would be "ppppp ppppp pppppp"
sin = przyprostokątna przeciwległa podzielona przez przeciwprostokątną
cos = przyprostokątna przyległa podzielona przez przeciwprostokątną
tan = przyprostokątna przeciwległa podzielona przez przyprostokątną przyległą
It's the best mnemonic technique. EVER!!!1
I feel like after reading this comment, I officially lost the authority to complain about anything in life.
cristixyz
Well nobody would ever use this ridiculous method. It's just opposite to useful. There's a chance that I was the first person to "invent" it at the time.
cristixyz
Complaining can be really useful sometimes, even if you're living a wonderful life with luxuries such as clean running water, food, sewage system, very advanced calculator, Internet access and plenty of toilet paper. There are plenty of uncolonized planets, stupid government policies, mosquitoes, poor people, adware and many other more or less important issues that require attention. :)
Telecorpse! Whoa! What language is that!?
you just stole the words off of my tongue !!
Why didn't my Trig teacher in high school explain it to me like this... This makes soooo much sence now... I love you guys.
sense u mean
The colors helps me super much. I already learned the basic, im just watching to solidify, and get it in with those colors. Math is way easier when its presented with pretty colors
Ive got my maths test today, and my maths teacher thought it would be smart to skip this part and go straight into determining angles and sides, thanks Khan
instead of SohCahToa my teacher taught us:
Some old hippie
Caught another hippie
Tripping on Acid
I remember that better :)
I love the way he always slowly repeats the occasional word.
Awesome I have no better word to explain! Its just Perfect! Thanks a lot!! I wish this guy was my professor ...
This is worthy of a subscriber for real, I mean this video actually helped me in my studies! I should have thought of this long ago. Thanks man (y)
Hi,could you please say me how to find the values of sin,cos & tan degrees without using calculator?
Thank you! I have a GED test this sat. and your videos are helping me learn fast and in a fun way! (because your kinda funny) Your lessons are greatly appreciated. Keep up the good work!
This is the video that made me LOVE Trig, well math in general for the whole site. KhanAcademy is an amazing site. With other teachers I get the feeling that they just do not care at all. I do not get that feeling here. Great Stuff.
Thank you so much. I remember in 6th grade i heard of sine, and I had NO CLUE what it meant. In 7th grade, I found them in my brother's Algebra I book, but I didn't get it at all. When I found out I was taking Algebra I AND Geometry in my 8th grade year, I realized I would be taking Trig in my Sophomore year. I was planning on taking Trig and Pre-Calc at the same time so I can take Calc II in my Senior year. I knew I'd need as much advantage as possible, otherwise I would fail due to difficulty
I came here to expand more my knowledge with the basics 😂
Nice video. I am trying to prepare for Trig in college next month. I barely passed Algebra. Never been good in understanding Math. I think i got this a little bit though. Maybe take a few times watching it to get it to absorb in my brain!
here because corona virus stopped school but we still have to study from the links they put on the school website checkk
You're far better than my school and tuition teacher.
Watching after 10 years 😂 , thanks sir 👍
what program are you writing with / thank you my class and i watch you in maths :D year 10 you are so helpful
The Trigonometry class I'm taking starts in two weeks I plan to watch all your videos on the subject Khan Academy I learned a lot from this one 9min video and I want to learn more!
I'm a bit 'slower' and so I literally don't get anything out of sitting in class for an hour listening to my teacher talk yet I come here and everything makes sense and everything's explained in a very reasonable amount of time big big thanks khan 👍
why do we even have to learn this at school?!
frr 😂😭
why can't they show us this basic thing in class instead of making it complicated
Cus school is annoying and they like to make things complicated
the new mode of studying hard subjects hats off to the creator
Thanks. You made it look easier. I couldn't even understand what's written in the math book...
My finals are tommorow 💀
I passed :)
@@DustAnimosus Nice Job!!!
Watched this for the test.Got a good grade in it,now forgot anything.
Great! It is just fantastic. It will help developing world students and teachers a lot. Thank you to the Khanacademy
You guys are very helpful im passing my grades well thank you
I'm studying for the entrance exam here in the Philippines. Let's go kababayans!🇵🇭🇵🇭🇵🇭
Can't believe I'm here now
thank u for helping me understand my math assignments!! 💓
Great! It just fantastic. It will help developing world students and teachers a lot. Thank you to the Khanacademy
Thanks! Subscribed ! :)
I believe you are using a tablet, no human being has such good hand writing using a mouse
no, all khan academy teachers use a pc
@@allenleetableflip4807 wacom is a drawing tablet
@@allenleetableflip4807 how do yk lol? Have u seen them?
@kavalpatel23
That is when you have to use the unit circle definition to find the cos or tan of the right angle.
If you are curious, cos(90 degrees) = 0
tan(90 degrees) is undefined.
Thank you I’m learning trigonometry right now but learning it online is very hard and your explanation helped me 😭❤️👌
When Khan Academy makes math better than your teacher.....!
Like below if true
👇👇👇👇👇
when you're cramming before a test that will determine if you will pass or fail for the semester and realize you should have come here months ago.....
Thank you so much! I finally understand!
He is the best teacherrr! This 10 year old video was the most important thing i needed today🤓
It's easier to remember Some old horses can always hear their owners approach
Sin is O\H
COS IS A/H
TAN IS O/A
@Jason Christensen lmao
whose watching in 2018?! Anyone?!
I am proud of him Bcoz he is a Bangladeshi..and I'm also from the same country! Salute to you Salman
@purplehaze216
The sin function is to be used with the angles inside the triangle, not the sides. Also, your calculator will probably calculate the ratio of the sides to give you the decimal value of what that ratio/fraction would be. To get a fraction from a TI-83 or similar calculator. press MATH-->ENTER-->ENTER.
Im Still confused Math is one tough subject man i hope i do all right on my placeMent Test
I'm sorry, when you said "pneumonic" in the video it really bothered me because it's spelled "mnemonic" and I don't see where you could have gotten the "u" sound from. Pneumonic means relating to pneumonia.
who cares, it's just a word, and this isn't English.
MELISSAPERRY
I just started learning trigonometry recently and this video helped a lot
I wish I'll get here more knowledge when I hear khan academy I believe I would love mathematics from Somali
Who's on here because their teacher can't teach?
get a better microphone
That was SIX years ago...
Trystan- *SEVEN
my indian teacher taught me like this: some people have, curly brown hair, turned permanently black -------> sin = perpendicular/hyp, cos = base/ hyp, tan = perpendicular/ base; and i never forgot it ever since....
Amazing way of teaching :) For GK session.. I found Vidya Guru videos really helpful, all their video have excellently helped me in exams.