cos^(4)A-cos^(2)A=sin4A-sin^(2)theta

(sin theta-sin phi)^(2)+(cos theta-cos phi)^(2)=4sin^(2)(theta-phi)/(2)

If sin^(4)theta-cos^(4)=k^(4), then sin^(2)theta-cos^(2)theta is __________.

"(i) "sin^(4)theta-cos^(4)theta=sin^(2)theta-cos^(2)theta

Prove that : sin^(2)theta+cos^(4)theta=cos^(2)theta+sin^(4)theta

Prove that : sin^(2)theta+cos^(4)theta=cos^(2)theta+sin^(4)theta

Prove that sin^(4)theta-cos^(4)theta=sin^(2)theta-cos^(2)theta

Prove that (cos^(4)theta-sin^(4)theta)/(cos^(2)theta-sin^(2)theta)=1

Prove that sin^(4)theta-cos^(4)theta=sin^(2)theta-cos^(2)theta .

The value of theta lying between 0 and (pi)/(2), and satisfying ,,1+sin^(2)theta,cos^(2)theta,4sin4 thetasin^(2)theta,1+cos^(2)theta,4sin4 thetasin^(2)theta,cos^(2)theta,1+4sin4 theta]|=0