Question
If $f\left(\frac{2 \tan x}{1+\tan ^{2} x}\right)=\frac{1}{2}(1+\cos 2 x)\left(\sec ^{2} x+2 \tan x\right)$then find $f(x)$.
Step 1
Step 1: We are given that $f\left(\frac{2 \tan x}{1+\tan ^{2} x}\right)=\frac{1}{2}(1+\cos 2 x)\left(\sec ^{2} x+2 \tan x\right)$. Show more…
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