" (7) "sec^(4)theta-cos^(4)theta=1-2cos^(2)theta

Show: 2sec^(2)theta-sec^(4)theta-2cos ec^(2)theta+cos ec^(4)theta=cot^(4)theta-tan^(4)theta

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

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

The value of (2(sin^(6)theta+cos^(6)theta)-3(sin^(4)theta+cos^(4)theta))/(cos^(4)theta-sin^(4)theta-2cos^(2)theta) is :

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

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

Value of sec^(2)theta-(sin^(2)theta-2sin^(4)theta)/(2cos^(4)theta-cos^(2)theta) is

Prove the following identities: 2sec^(2)theta-sec^(4)theta-2cos ec^(2)theta+cos ec^(4)theta=cot^(4)theta-tan^(4)theta

If sin theta + sin^(2) theta =1 then cos^(4) theta + cos^(8) theta + 2 cos^(6) theta =