CBSE > Class 11 > Mathematics | CBSE Board | Homework Help

LHS = sin²(6x) - sin²(4x)
Use the formula,
(a² - b²) = (a - b)(a + b)
= (sin6x -sin4x)(sin6x +sin4x)
Now,
Use the formula,
sinC + sinD = 2sin(C+D)/2.cos(C-D)/2
sinC - sinD = 2cos(C+D)/2.sin(C-D)/2

={2cos(6x+4x)/2.sin(6x-4x)/2}{2sin(6x+4x)/2.cos(6x-4x)/2}
={2cos5x.sinx}{2sin5x.cosx}
={2sin5x.cos5x}{2sinx.cosx}

Use the formula,
sin2A = 2sinA.cosA

= sin2(5x).sin2(x)
= sin10x.sin2x =RHS

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ANSWER

F(x)=2x√1-x^2

Posted by Good Girl Aditi 5 years, 1 month ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Whosoever support but the thing how cheap the people are becoming of India!!

Posted by ⠀ 5 years, 1 month ago

CBSE > Class 11 > Mathematics

1 answers

⠀ 5 years, 1 month ago

These are nkt people , these are demons and they do not have any right to live in India. I dont know why these hell people are freea

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If secX =13\5x lies in the founts quadrant . Find the value of other five trigonometric function

Posted by Payal Suryawanshi 5 years, 1 month ago

CBSE > Class 11 > Mathematics

1 answers

Gaurav Seth 5 years, 1 month ago

Answer:

1) sec X = 13/5

x lies in 4th quadrant.

cos X = 1/ secx

2) So, cos x = 5/13

sin X = √ 1- cos²x

3) sin X = -12/13

⚆As sin functions-ve in 4th quadrant.

cosec X = 1/sin X

4) cosec X = -13/12

⚆As cosec functions-ve in 4th quadrant.

tan X = √ sec² x-1

5)tan X = -12/5

⚆As tan functions-ve in 4th quadrant.

Cot x = 1/ tan X

6)Cot x = -5/12

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ANSWER

Prove that cot(A+15°) -tan (A-15°) =4cos2A\ 1+2sin2A

Posted by Payal Suryawanshi 5 years, 1 month ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Who is फालतु here.

Posted by Vishal Pandey 5 years, 1 month ago

CBSE > Class 11 > Mathematics

2 answers

Vishal Pandey 5 years, 1 month ago

Oh nice of you?‍♀️

2Thank You

⠀ 5 years, 1 month ago

Vishal Pandey

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ANSWER

Mr SS I am of class 11 and I have asked that ques because I saw somewhat related ques but more difficult . I made it simpler and logical to that way only.

Posted by ⠀ 5 years, 1 month ago

CBSE > Class 11 > Mathematics

4 answers

? S. S. ? 5 years, 1 month ago

oh okay nice to meet u legendary #smarakee right??!...and thanks royal??

1Thank You

⠀ 5 years, 1 month ago

Ok then sorry for misunderstanding

1Thank You

⠀ 5 years, 1 month ago

Thanks for free advice?

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Vishal Pandey 5 years, 1 month ago

Go and get understand how to speak English correctly.

3Thank You

ANSWER

Solve the equation cos theta + sin30 = 2cos20

Posted by Payal Suryawanshi 5 years, 1 month ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

If log₁₂16 = a, then the value of log₆27 in terms of 'a' is...???

Posted by Aadya Singh 5 years, 1 month ago

CBSE > Class 11 > Mathematics

1 answers

K R $ Malun Hai Na 5 years, 1 month ago

X^n + y^n/x^n-1 + y^n-1 =root xy

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ANSWER

The sum of values of x satisfying the following equation is :
log₄(x+1) + log₄(x+4) = 1...

Posted by Aadya Singh 5 years, 1 month ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Solve for x :-
1+6log_(x+2)4 = log₄(x+2)

Posted by Aadya Singh 5 years, 1 month ago

CBSE > Class 11 > Mathematics

2 answers

Aryan Agg 4 years, 4 months ago

F U C K

0Thank You

Aryan Agg 4 years, 4 months ago

****

1Thank You

ANSWER

Find range of fx= 1+3cos2x

Posted by Tanmay Sengar 5 years, 1 month ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

I asked a ques in maths abouf derivatives and that was a challenge. Now i want to told that the answer is -cotx and aadya has done it very correctly
Well done???
Well that's a 12 class ques but indeed appreciable??

Posted by ⠀ 5 years, 1 month ago

CBSE > Class 11 > Mathematics

4 answers

⠀ 5 years, 1 month ago

Btw 11 book is quite easy no ? I dont even practice maths at home and score at least 99% in tests . See if I study what I can do

1Thank You

⠀ 5 years, 1 month ago

Itz all because of 'tez dimaag'

1Thank You

? S. S. ? 5 years, 1 month ago

Ooo??.... great aadya???.... btw mujhse 11th ki book mushkil se horhi hai tum 12th ki book ke questions solve krhi ho??

2Thank You

⠀ 5 years, 1 month ago

Note :- Agar cheating nhi ki to hi appreciable hai kripya dhyan de

2Thank You

ANSWER

Challenge!!!
Solve for x:
$$\dfrac{d}{d cosx} (sinx)$$

Posted by ⠀ 5 years, 1 month ago

CBSE > Class 11 > Mathematics

4 answers

Ayush Kashyap 5 years, 1 month ago

Answer is cot x

1Thank You

? S. S. ? 5 years, 1 month ago

Let u =sinx and v= cosx .....d(sinx)/d (cosx)......d(u/v)= (v du + u dv )/ v²..... [ cosx × d(sin x) - sinx × d(cosx)] / (cosx)² Since, d(sin x) = cos x and d(cos x) = -sin x Therefore, [(cosx)² + (Sinx)²]/ (cosx)²= 1/ (cos x)²=(secx)²

1Thank You

? S. S. ? 5 years, 1 month ago

Mera toh kuch or hii answer arha hai...?sec²x....

0Thank You

⠀ 5 years, 1 month ago

Not x but solve it

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ANSWER

2 5 5 %!

Posted by Ayush Gupta 5 years, 1 month ago

CBSE > Class 11 > Mathematics