Question

Evaluate $\int \frac{2}{1+\cos 2x}dx$

Answer 1

$I=\int \frac{2}{1+\cos 2x}dx$

$I=\int \frac{2}{2co{s}^{2}x}dx$

$I=\int se{c}^{2}xdx$

$I=\tan x+C$