If `2cos^2theta-2sin^2theta=1`,then `theta` is equal to

If 2cos^(2)theta-2sin^(2)theta=1, then theta equals to

If sin theta+sin2theta+sin3theta=sin alpha and cos theta+cos 2theta+cos3theta=cos alpha , then theta is equal to

If sin theta+sin2theta+sin3theta=sin alpha and cos theta+cos 2theta+cos3theta=cos alpha , then theta is equal to

If sin theta+sin2theta+sin3theta=sin alpha and cos theta+cos 2theta+cos3theta=cos alpha , then theta is equal to

If x=(2sin theta)/(1+cos theta+sin theta), then prove that (1-cos theta+sin theta)/(1+sin theta) is equal to x

If 29 tan theta = 31 then the value of (1 +2 sin theta cos theta)/(1- 2 sin theta cos theta) is equal to

If cos theta =4/5 then sin^2 theta cos theta + cos^2 theta sin theta is equal to :

2(cos^(2)theta-sin^(2)theta)=1(theta is a positive acute angle),then cot theta is equal to