Trigonometry: Finding missing sides and angles

Rachel explains how to use trigonometry to find the lengths of missing sides and the size of angles in right-angled triangles.

[@spheh]

If i watched this video before writing my test,i would have passed 😭,but I'm surely getting an +A for my next test😌....THANK YOU SO MUCH FOR FINALLY MAKING ME UNDERSTAND 🌺❤️❤️❤️

[@user-qx4mq5rp7u]

Did you get A+?

[@JigmeeLodayJukzin]

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[@theresarowe9100]

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[@Turntochrist12]

@@user-qx4mq5rp7u Jesus Christ is king he’s the only way to heaven he loves u he wants to forgive you he’s the only way to heaven and the only one who can save us he rose again he was the only one to do that Romans 10:9 John 14-15 Philipians 4:13

[@Turntochrist12]

Jesus Christ is king he’s the only way to heaven he loves u he wants to forgive you he’s the only way to heaven and the only one who can save us he rose again he was the only one to do that Romans 10:9 John 14-15 Philipians 4:13

[@usamausama9068]

Thank you very much! This really answered a lot of questions I had when it comes to answering these type of questions, thank you so so much! Keep it up and God bless!

[@lea_jk]

Omg i love this video ,i have a test tomorrow and its going to help me so much ...thank youuu, i literally download the video to help me each time i have difficulty

[@moathodinelsonphale9634]

I will never forget this u are important god bless you❤I'm writing my exam this October i will do.good

[@usamausama9068]

Thank you so so much! This was an easy and simple explanation rather than one of those complex ones. I really appreciate your time and effort in creating this video and helping out people like me.. this helped me out! Finally understand!! I have been struggling with this for weeks. Now everything has changed because of your video!! Great job in explaining

[@Turntochrist12]

Jesus Christ is king he’s the only way to heaven he loves u he wants to forgive you he’s the only way to heaven and the only one who can save us he rose again he was the only one to do that Romans 10:9 John 14-15 Philipians 4:13

[@user-ft7tk9jr4t]

This has really helped me out because this is such an simple explanation. Thank you so much!!

[@Turntochrist12]

Jesus Christ is king he’s the only way to heaven he loves u he wants to forgive you he’s the only way to heaven and the only one who can save us he rose again he was the only one to do that Romans 10:9 John 14-15 Philipians 4:13

[@michaeltraynor4825]

Brilliant explanation, thank you, Rachel.

[@UnomuinjoZamuee]

This us literally the best explanation ever thank you so much

[@vincentbarkley9121]

Lovely, perfectly clear, simple explanation. Great job. Thank you.

[@Turntochrist12]

Jesus Christ is king he’s the only way to heaven he loves u he wants to forgive you he’s the only way to heaven and the only one who can save us he rose again he was the only one to do that Romans 10:9 John 14-15 Philipians 4:13

[@rheawindsor4625]

Thank you so so much .. this helped me out! Finally understand!! ❤ been struggling with this for weeks. Great job in explaining 💯

[@sophiamartin4534]

This was very helpful ,good job 👍

[@moathodinelsonphale9634]

Wow that's the simplest explanation i had never seen🎉❤❤

[@ciaramundy3419]

Great video! Really well explained :)

[@christiandeocampo7533]

Thank you so much you were such a big help. Your examples are brillient it helps me to understand easily again thank you.

[@Turntochrist12]

Jesus Christ is king he’s the only way to heaven he loves u he wants to forgive you he’s the only way to heaven and the only one who can save us he rose again he was the only one to do that Romans 10:9 John 14-15 Philipians 4:13

[@luongly8157]

thank you very much for your times to make up this video. I understand what they’re now .after your videos.

[@indopakk]

U r a born teacher...

[@zawmoethant4305]

This was very helpful ,good job.

[@goldroger2856]

Biggest respect for you ma'am I really really appreciate your help ❤

[@cionnerolle8442]

Thank you thank you so much for this i really needed this tip on triogonometry for my final exam

[@michaelbardot2017]

Thank you for making this so easy to understand!

[@beltanalule]

yo really Fantastic

[@kalai-hi4gb]

Good clarity, neat handwriting with explanation great job

[@Turntochrist12]

Jesus Christ is king he’s the only way to heaven he loves u he wants to forgive you he’s the only way to heaven and the only one who can save us he rose again he was the only one to do that Romans 10:9 John 14-15 Philipians 4:13

[@osamaawaisawaisahmad5065]

thanks it is very help full

[@user-kv6bf4oq2i]

Very good need more of your videos

[@miztanesh5240]

thx so much for u formula that helps me so much to understand this topic
😊

[@usamausama9068]

I am going to share this video!!

[@kritisarraf8986]

Thanks for this trick
It will help me lot.👍🏻👏🏻❤

[@JanetMercy-cf9nz]

Thanks so much, for the perfect explanation

[@SolomonDavid-fj6yq]

Well explained like it

[@punaraoneli6738]

Thank you so much for this video i understood it very well even feom my tutor i didnt understand this lesson thank you so much...😁💗💐

[@based_yeoman9138]

Simple indeed. Thank you!

[@nickcappelletty5678]

Love this thank you

[@user-pl9dd2fj1v]

Thanks so much ma,I really enjoyed it

[@Emily_Moonlight26200]

Thank you so much 🙏🏽💫

[@prabinsingh4]

Thank you teacher 😃

[@UyoDaughtersofSarahMinistry202]

This is helpful thanks 👍

[@hurky7232]

Very helpful

[@Legend45150]

we understand how you teach us thank you

[@Luci4TCND]

Helpful as thank you so much

[@linahrithagov4653]

Thank you so much 🤍🤍🤍🤍🤍

[@Lin_Parker]

POV🤔: CZcams Teaches BETTER than SCHOOL! I just realized that! Studying through CZcams is better than sitting at clz 4 1hr 😅

[@Lin_Parker]

Thank you, Soo, MUCH!!! I just realized how easy this lesson was 4 a 14 year old like me!😅😂🤩

[@DorcasSarpong-bn2wb]

Much appreciated 👍

[@gabrielbarredo4776]

Thank you so much 🎉🎉🎉🎉❤❤❤

[@SleepyBasket-fu6mw]

Can you please do a video while using a 4 figure table to find the tan inverse

[@user-ls3ry8nc4z]

Litterly i understood like thanks so so so much❤😊

[@nadershaji5356]

Thank you so much

[@drakiiki8594]

Thank you very much madam

[@glenda8161]

@ Spheh do you have trigonometry as a subject . Or is it a chapter in mathematics.

[@jonathangan3366]

Thank you

[@karthickrajendran7057]

Thank u deivame 🙏

[@ravichaudhary3054]

What if perpendicular is 2000cm and base is 20cm then what will be value of theta ..please tell

[@Aisha-gd6dq]

Thank you bestie

[@you_ate_my_sandwich3734]

Bro I’m literally watching this video 10 minutes before my test 😭✋

[@Ballerina.Dancer]

THANK YOU

[@user-ho3ll1uy1q]

This is good 🎉

[@user-fe6yd8fp3f]

Thanks sis

[@adaoranwoba2394]

Thanks a great deal.
Well detailed explanations.

[@ginochavez4009]

If only my teacher could explained as good are this lady 😢

[@mukholimiltonabra8364]

Great 🤩🤩

[@GigaMario86]

This was useful

[@user-mc2ge9tv3q]

Thanks so much I passed my exam

[@RepeatMyLagz]

God bless you woman

[@WakabiSamuel-vi8gr]

Thanks

[@kunai9044]

u saved me 1 week before my exams it was my first time learning this so thanks

[@bobbymathew4622]

Actually i have a dought " for the 2nd answer how did you get that 26.2 i got 26.15170193 as the answer idk how you got that '.2' can anyone pls explain

[@sciencemadesimple8924]

As you can see on the calculator, that's the answer I got too. 26.2 is 26.15170193 rounded to 3 significant figures.

[@throwawaychannel7612]

Thank you, you saved me a migraine from trying to figure this out on my own lol

[@typ0761]

For the middle triangle, I don't get it, cos=15/a, a we don't know the value of, so, for the final answer, you need to devide 15/cos, but we don't know cos. Please help

[@sciencemadesimple8924]

Because the angle is 55, you divide 15 by "cos15" - using the calculator function for cos, as I demonstrate at 6:39

[@user-lh1mn5pc8x]

So question I put in my calculator Sin(15) and it gives me like a really weird answers instead of a number?

[@sciencemadesimple8924]

Try pressing the S D button, which will transform your answers between numbers and surds. It is also worth checking your calculator is in degrees (there's a little D at the top) and not radians (a little R at the top).

[@OriginsPlays]

nice

[@aftaburrahman7905]

I have some problem would you like to help me

[@valerian8587]

What calculator do you use?

[@sciencemadesimple8924]

I use a Casio fx-83GT plus, but many scientific calculators are very similar, so it shouldn't matter too much. Any Casio will probably work very similarly.

[@AmenTarik]

I wish I could give 100k now really thanks 😊😊😊😊

[@mysteriousbootyhead2083]

What of its 150 degrees?

[@sciencemadesimple8924]

You'll need to use the sin or cos rules for triangles that don't have a right angle in them.

[@teyannabenjamin3832]

When do we use inverse? Is it just for TAN?

[@sciencemadesimple8924]

No, each of sin, cos and tan have their own inverses (usually the second function above the main sin, cos, tan button). You use the inverse when you have two sides and are trying to find an angle.

[@teyannabenjamin3832]

I was really baffled about that thank you for answering :)

[@strawberryzin4332]

got a different answer in question #2. in my calculator (in phone with sin cos tan) the answer is 26.31

[@sciencemadesimple8924]

I recommend using brackets/parentheses to see if that helps you get the correct answer?

[@Alliyah458]

👏🏻❤

[@user-zk3ir7sg9d]

How come for the second angle we weren’t given the opp side

[@sciencemadesimple8924]

Because you only need one angle, one side, and to find the length of the lettered side (in this case, a). If you wanted to find the opposite, you could use Pythagoras' theorem after finding a.

[@kumbajome4017]

Thank you so much but please enlarge the writings to be recognize

[@euelakliluthejoker7506]

ayo i understand whats going on but this is completely different from what i am learning . For the 3rd question shouldn't you press inverse tan then divide 5 over 8 ? For the rest of the new viewers , yall can scroll down to see the other comments that were helped.

[@sciencemadesimple8924]

So you could do tan^-1 (5/8) straight away. That's doing more or less the same thing I am, but just does it in fewer steps. The explanation above just breaks it down a little more.

[@euelakliluthejoker7506]

@@sciencemadesimple8924 okay bet thanks 👍

[@user-pr5qf7ub6n]

What if u have all sides

[@sciencemadesimple8924]

Then you use a slightly different method using the Cosine rule. I don't have a video on it, unfortunately, but there's a guide here: www.mathsisfun.com/algebra/trig-solving-sss-triangles.html

[@mohsinamin4031]

I have a doubt where we us SIN COS TAN
whenever you're available please answer me
thanks

[@sciencemadesimple8924]

Hi, what is your doubt?

[@sleeperracing1477]

@@sciencemadesimple8924 he is asking where we use soh cah toa

[@sciencemadesimple8924]

@@sleeperracing1477 You use it when you are asked to find missing angles or missing sides in right-angled triangles.

[@billracicot2110]

All of these videos are like "the answer is use your calculator." Euclid didn't have a calculator. How is this actually DONE?

[@Irbjtenjyrbhrgn]

No one cares

[@moneyoverngas]

@@IrbjtenjyrbhrgnPeople who gaf about their grades and education care. sthu

[@user-bt7zq5vn3c]

sin opp/hyp

[@josephineachigbule692]

pls I don't understand

[@sciencemadesimple8924]

Which part?

[@LukmonAdeboye]

I don't understand ma please

[@PetuhGriffin]

If you all forget use it like this
soh- suck
cah- ah
toa- toe
Something visually different makes it understandable

[@AmenTarik]

I think you say 26.2... but in calculator it says 26.1...

[@sciencemadesimple8924]

Yes, that's right. Because the calculator is showing 26.1517..., that gets rounded up to 26.2.

[@ariannabrowne5647]

I have exam soon

[@TyraMinott-ek6sp]

Same

[@christ9862]

@@TyraMinott-ek6spsame, thursday :(

[@user-ho3ll1uy1q]

I am giving you 1,000,naira000

[@woof_iiiu]

Thank you very much! This really answered alot of questions I had when it comes to answering these type of questions, thank you so so much! Keep it up and God bless!

[@Turntochrist12]

Jesus Christ is king he’s the only way to heaven he loves u he wants to forgive you he’s the only way to heaven and the only one who can save us he rose again he was the only one to do that Romans 10:9 John 14-15 Philipians 4:13

[@woof_iiiu]

@@Turntochrist12 Amen, praise God !