$\tan A=x$ হলে $\sin 2 \mathrm{~A}+\tan 2 \mathrm{~A}=?$

$\frac{4 x}{1-x^{4}}$

$\frac{4 x^{2}}{1-x^{3}}$

$\frac{x}{1-x^{2}}$

$\frac{4 x}{1-x^{2}}$