Exercise 12.3, First Year Mathematics

This video is for the students of 11th class math and it covers exercise 12.3 of chapter 12 which is application of trigonometry.
Content of The Video
00:00 Introduction To Factorization
00:43 Question 1
02:48 Question 2
07:38 Question 3
09:38 Question 4
12:12 Question 5
14:17 Question 6
16:01 Question 7
17:50 Question 8
21:33 Question 9
26:03 Question 10
28:09 Question 11
31:36 Question 12
34:16 Question 13
38:28 Question 14
42:30 Question 15

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Only first 6question from this exercise

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The only short questions that come from this exercise in boards are question 1,3,5,6 (short) and question 9 is important for long

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[@Shadow_Gaming02]

Q 4 : Find its length = Hypotenuse ? , Base = 5m ( already given)
Formula : Cos = B/H.
Angle is 24° with the ground ( Sir made a mistake there)
Cos 24° = 5/H
0.91354=5/H
H=5/0.91354
H=5.47m (Answer)
Thank you 😊...

[@abdullahasif-fz2pj]

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[@abdullahasif-fz2pj]

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[@sherryeditz4152]

Kuch bhi dehan se prho 24° with wall likha ha or ladder ki length find krni hai

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Lakin sir question no 4 ka answer nhi same kuk sir uss ma asl ma tan WALA formula Ni cos WALA lgna ha
Ye correction krdain ISME takay Baki bachay glt na kre
Lots of love sir
God bless you with many more ❤

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Sir x jo apny liye wo length of the tower ha or os ky upr pole and flag lga hoa ha or osy y ly gy?

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[@sheikhsaqib4661]

Sir g 4 question main 9:38 may apne angle wall k sath lia hay wo thiek hay lwkin sir wo angle bita hay to hum cos bita hi lain gay cos hi layna hay q kay zameen hi base hay or ladder phir hypotenuse to formula cos ka hi lagay ga thank you Sir g

[@Hafsahnoor_]

Nahi, 24° se 90° degree wali line base hai, diagram bna k rotate kar k dekhe to samajh a jae gi

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Is m Qs no 4 m cos k formula s base over hypatenous s answer thk ata h

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Qno 4 ma cos use hoga

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8:17 agar angle of depression hai to ye upar wali side par kio nhi aya???
A or C k darmian..?

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Angle of depression triangle ke bahir banna tha or bahir ka angle opposite sides par inner angle ke equal hota hai

[@haseebkhalid6377]

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[@muhammadhuzaifa7571]

Queation no. 4 ghalat kiya hai.Us ma cos ka formula lagna hai aur answer 5.47 m aye ga.

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2hours 44 minutes 💀

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[@ayeshasafeer9667]

Sir q3 wrong hai is main cos24 lagta hai. Book ka 5.47 cos say Sahi aa Raha hai.kindly book say check kar Kay dia karen

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Q no 4 mistake....answer is 5.47m........cos theta=b/h we have base not perpendicular...

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[@zahraimran2823]

No its perpendicular because Thita k sath hameesha base hoti hi aur Thita k samna always perpendicular hota hi .... Mai na b yhi socha tha🤠 but now it's clear k Thita k samna hameesha perpendicular hota hi !!!!

[@msnrza]

Sir i guess you have done a mistake in question number11 in triangle ABC the theta should be 62 but you've put 64 please look into it and if i am wrong please correct me.

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3 hours left in exam... 2x speed moment.

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Sir Q4 ka Answer incorrect ha.sin ki jaga cos lagta ha

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Through proper brushing

[@MustafaNadir-xt6hp]

Question 4 is wrong sir Cos = base/hypotenuse Wala formula use ho ga

[@wasitali6517]

Sir ap k Qs no 4 ka. Ans ni match hota h

[@Miles_Wanderer]

Ustad g Question 4 aap ne ghalat kardia hay
answer book mein 5.47m ata hay
"angle 24 degrees with the wall" ka matlab wohi hay, ke ladder 24 degrees ki angle pe wall ke sath take laga raha hay. is se ye matlab nahi ke ground magic se perpendicular ban gya. Common sense ki baat hay "foot of the ladder is 5m from the wall" yani ke base 5m batai hay.
cos 24 = 5/hypotenuse banta hay
us se answer sahi ata hay
aur angle uper wale corner mein ho ya neechay wale mein, baat aik hi hay, foot of the ladder will be on the ground, not magically floating diagonally in the air

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Sir in Question no 7 the angle is understandable

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4 wale question ka answer change ha book pr

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Thanks

[@Informational_Shorts01]

Sir apka question 4 wrong hai book main answer aur hai kyu ke apne jo perpendicular banaya tha usko base likhna tha aur cos lagana tha