If `A-2sin^2theta-cos2theta,t h e nA` lies in the interval `[-1,3]` (b) `[1,2]` (c) `[-2,4]` (d) none of these

If A=2sin^2theta-cos2theta,t h e nA lies in the interval (a) [-1,3] (b) [1,2] (c) [-2,4] (d) none of these

If A=2sin^2theta-cos2theta, t h e n A lies in the interval (a) [-1,3] (b) [1,2] (c) [-2,4] (d) none of these

If y =4sin^(2)theta-cos2theta ,then y lies in the interval

If A-2sin^(2)theta-cos2 theta, then A lies in the interval [-1,3](1,2](c)[-2,4](d) none of these

The number of solution of the pair of equations 2sin^2theta-cos2theta=0a n d 2cos^2theta-3sintheta=0 in the interval [0,2pi] is 0 (b) 1 (c) 2 (d) 4

The number of solution of the pair of equations 2sin^2theta-cos2theta=0a n d 2cos^2theta-3sintheta=0 in the interval [0,2pi] is 0 (b) 1 (c) 2 (d) 4

The number of solution of the pair of equations 2sin^2theta-cos2theta=0a n d 2cos^2theta-3sintheta=0 in the interval [0,2pi] is 0 (b) 1 (c) 2 (d) 4

If tan^2theta=2tan^2phi+1,t h e ncos2theta+sin^2phi equals (a) -1 (b) 0 (c) 1 (d) none of these

The value of cos^4theta+sin^4theta-6cos^2theta is (a) cos2theta (b) sin2theta (c) cos4theta (d) none of these