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(Solved): prove identity 7. Prove the following identity. tan2xcos2x=1+sin2x(sec2x1)(1sin4x) 8. Proo ...



prove identity


7. Prove the following identity.
\[
\tan ^{2} x \cos ^{2} x=\frac{\left(\sec ^{2} x-1\right)\left(1-\sin ^{4} x\right)}{1+\si
7. Prove the following identity. 8. Proof the following identity.


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