1+(2tan^(2)theta)/(cos^(2)theta)=tan^(4)theta+sec^(4)theta

Prove that following identities tan^(4)theta+tan^(2)theta=sec^(4)theta-sec^(2)theta

Prove that : tan^(4)theta + tan^(2)theta = sec^(4)theta - sec^(2) theta

Prove that : tan^(4)theta + tan^(2)theta = sec^(4)theta - sec^(2) theta

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

Prove the following identity: sec^(4)theta-sec^(2)theta=tan^(4)theta+tan^(2)theta

Prove the identity sec^(4)theta-sec^(2)theta=tan^(4)theta+tan^(2)theta

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

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