The value of `t a nthetasin(pi/2+theta)cos(pi/2-theta)` is `-1` b. `1` c. `1/2sin2theta` d. none of these

The value of tan theta sin((pi)/(2)+theta)cos((pi)/(2)-theta) is -1 b.1 c.(1)/(2)sin2 theta d.none of these

The value of t a nthetasin(pi/2+theta)cos(pi/2-theta) is..................... a. -1 b. 1 c. cos^(2) theta d. sin ^(2) theta

The value of cos^2(pi/6+theta)-sin^2\ \ (pi/6-theta) is a, 1/2cos2theta b. 0 c. -1/2cos2theta d. -cot35^0

The value of (cos3 theta)/(2cos2 theta-1) is equal to cos theta(b)sin theta (c) tan theta(d) none of these

The value of cos^2(pi/6+theta)-sin^2(pi/6-theta) is ............... A) 1/2 cos 2 theta B) 0 C) -1/2 cos 2 theta D) 1/2

The value of cos^(2)((pi)/(6)+theta)-s in62((pi)/(6)-theta) is a(i)/(2)cos2 theta b.0c.-(1)/(2)cos2 theta d.(1)/(2)

The value of cos^2(pi/6+theta)-sin ^2\ (pi/6-theta) is (a)dot 1/2cos\ 2theta (b)dot 0 (c)dot -1/2cos2theta (d). 1/2

If sintheta+sin^2theta=1 , then cos^2theta+cos^4theta= (a) -1 (b) 1 (c) 0 (d) None of these

The value of sin(pi+theta)sin(pi-theta)cosec^(2)theta is equal to .................. A) 1 B) -1 C) sin theta D) -sin theta