The greatest value of `sin^4theta+cos^4thetai s` `1/2` (b) 1 (c) 2 (d) 3

The least value of 2sin^2theta+3cos^2theta is 1 (b) 2 (c) 3 (d) 5

Solve sin^(2) theta-2 cos theta+1/4=0

the value of 1/8 (3-4 cos 2 theta + cos 4 theta ) is

Solve 7cos^2theta+3sin^2theta=4

The greatest value of (2sin theta+3cos theta+4)^(3).(6-2sin theta-3cos theta)^(2) , as theta in R , is

If (costheta+cos2theta)^3=cos^3theta+cos^3 2theta, then the least positive value of theta is equal to pi/6 (b) pi/4 (c) pi/3 (d) pi/2

If tan^(-1)(sin^2theta-2sintheta+3)+cot^(-1)(5sin^(2theta)+1)=pi/2, then value of 2cos^2theta-sintheta is equal to 0 (b) -1 (c) 1 (d) none of these

Prove: sin^4 theta - cos^4theta = 1 - 2cos^2 theta

If sin^2theta_1+sin^2theta_2+sin^2theta_3=0, then which of the following is not the possible value of costheta_1+costheta_2+costheta_3? (a) 3 (b) -3 (c) -1 (d) -2

The number of solution the equation cos(theta).cos(pitheta)=1 has 0 (b) 1 (c) 4 (d) 2