Question

Pls give the answer of the qstion

If cos^2a+cos^4a=1, then the value of (tan^2a+tan^4a) /(sec^2atan^2a) =?

Answer 1

cos^4a=1-cos^2a

cos^4a=sin^2a

change the given eqn in sin n cos then put the value u will get the ans