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" (ii) "1+(2tan^(2)theta)/(cos^(2)theta)...

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

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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

Prove that 2sec^(2)theta-sec^(4)theta-2csc^(2)theta+csc^(4)theta=(1-tan^(8)theta)/(tan^(4)theta)

(1-cos^2theta)sec^2 theta= tan^2 theta