$\int \frac{\sin 2 x}{\cos ^{2} 2 x} d x=কত ?$

$\frac{1}{2} \sec 2 x+c$

$\frac{1}{2} \sec 2 x-c$

$\frac{1}{3} \sec 2 x+c$

$\frac{1}{3} \sec 2 x-c$