Home
Class 11
MATHS
1- 2 sin ^(2) ((pi)/(4) + theta)= .........

`1- 2 sin ^(2) ((pi)/(4) + theta)=` ................. A) `cos 2 theta ` B) `- cos 2 theta ` C) `sin 2 theta ` D) `- sin 2 theta `

A

`cos 2 theta `

B

`- cos 2 theta `

C

`sin 2 theta `

D

`- sin 2 theta `

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

4 sin ((pi)/(3) + theta)sin ((pi)/(3)- theta)= .............. A) 1+ cos theta B) 1- 2 cos 2 theta C) 2 cos 2 theta -1 D) 1+ 2 cos 2 theta

If theta in ((pi)/(2), (3pi)/(2)), then the value of sqrt(4 cos ^(4) theta + sin ^(2) 2 theta) + 4 cot theta cos ^(2) ((pi)/(4) -(theta)/(2)) is .............. A) -2 cot theta B) 2 cot theta C) 2 cos theta D) 2 sin theta

If x=2 cos theta- cos 2 theta and y=2 sin theta - sin 2 theta, then (dy)/(dx) =

If a tantheta=b , then a cos 2theta+b sin 2theta=

If costheta=1/2(x+1/x) then 1/2(x^2+1/x^2) =............. A) sin 2 theta B) cos 2 theta C) tan 2 theta D) sec 2 theta

(sin theta + sin 2 theta)/( 1+ cos theta + cos 2 theta)= .................. A) 1/2 tan theta B) 1/2 cot theta C) tan theta D) cot theta

cos 2 (theta+ phi) +4 cos (theta + phi ) sin theta sin phi + 2 sin ^(2) phi=

cos 2 theta is not equal to ................... A) 2 cos ^(2) theta -1 B) 1- 2 sin ^(2) theta C) (1+ tan ^(2) theta)/( 1- tan ^(2) theta) D) (1- tan ^(2) theta)/(1+ tan ^(2) theta)

Prove that : cos^(4)theta - cos^(2)theta = sin^(4)theta - sin^(2) theta

sin4theta can be written as................... A) 4 sin theta (1-2 sin ^(2) theta ) sqrt(1- sin ^(2) theta ) B) 2 sin theta cos theta sin ^(2) theta C) 4 sin theta - 6 sin ^(3) theta D) 4 sin theta + 6 sin ^(2) theta