For any angles A and B, cos(A+B).cos(A-B...

For any angles A and B, `cos(A+B).cos(A-B)=…..`

A

`cos(A^2-B^2)`

B

`sin^2A-sin^2B`

C

`cos^2A-cos^2B`

D

none of these

Verified by Experts

The correct Answer is:

C

|

TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES AND FACTORIZATION FORMULAE
MARVEL PUBLICATION|Exercise MCQs|101 Videos
TRIGONOMETRIC FUNCTIONS
MARVEL PUBLICATION|Exercise MCQs|175 Videos

Similar Questions

Explore conceptually related problems

For all values of angle A and B(i)cos(A-B)=cos A cos B+sin A sin B(ii)cos(A+B)=cos A cos B-sin A sin B

For any triangle ABC,prove that a cos A+b cos B+c cos C=2a sin B sin C

For all values of angle A and B(i)sin(A-B)=sin A cos B-cos A sin B(ii)sin(A+B)=sin A cos B+cos A sin B

In a triangle ABC, prove that for any angle theta,b cos(A-theta)+a cos(B+theta)=C cos theta

If B be the exterior angle of a regular polygon of n- sides and A is any constant then cos A+cos(A+B)+cos(A+2B)...n terms is equal to

For any triangle ABC, prove that (b+c)cos(B+C)/(2)=a cos(B-C)/(2)

In any triangle, (1+ cos (A-B)cos C)/(1+cos (A-C)cos B)=

For any triangle ABC,prove that a(b cos C-c cos B)=b^(2)-c^(2)

For any A,B in R, prove that cos(A-B)=cos A cos B+sin A sin B

In any triangle ABC, prove that: a cos A+b cos B+c cos C=2a sin B sin C