Question

prove that tan^4A+tan^2A=sec^4A-sec^2A
can u please solve this...

Answer 1

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Solution:-

tan^4A + tan^2A

=> Tan^2A (Tan^2A + 1)

=> (sec^2A -1) (Sec^2A)

=> Sec^4 - sec^2A.

Hence Proved.