MCQ
$2 \tan ^{-1} x=$
- ✓$\sin ^{-1} \frac{2 x}{1+x^2}$
- B$\sin ^{-1} \frac{2 x}{1-x^2}$
- C$\sin ^{-1} \frac{1-x^2}{1+x^2}$
- D$\sin ^{-1} \frac{1+x^2}{1-x^2}$
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