MCQ
$\tan ^{-1} \frac{2 x}{1-x^2}=$ प्रतिलोम त्रिकोणमितीय फलन :
- A$2 \sin ^{-1} x$
- B$\sin ^{-1} 2 x$
- C$\tan ^{-1} 2 x$
- ✓$2 \tan ^{-1} x$
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