The value of `cos^4theta+sin^4theta-6cos^2theta` is `cos2theta` (b) `s in2theta` (c) `cos4theta` (d) none of these

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

The value of cos^(4)theta+sin^(4)theta-6cos^(2)theta is cos2 theta (b) sin2 theta(c)cos4 theta(d) none of these

Solve cos^(4)theta-sin^(4)theta=cos^2theta

4cos6 theta cos4 theta cos2 theta=

Show that cos^(4)theta-sin^(4)theta=cos2theta

4 cos 6 theta cos 4 theta cos 2 theta =

The value of (sin2 theta+sin4 theta)/(1+cos2 theta+cos4 theta) is equal to

For any angle theta . (sin2theta+sin4theta+sin6theta+sin8theta)/(cos2theta+cos4theta+cos6theta+cos8theta)=.... (a) tantheta (b) tan 3theta (c) tan5theta (d) none of these

The value for 2(sin^6theta+cos^6theta)-3(sin^4theta+cos^4theta) +1 is

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