defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Differential Calculus Evaluation of derivatives
If \(\rm y=\sin^{-1}\left(\frac{1-x^2}{1+x^2}\right)\) then dy/dx =
1
\(-\frac{2}{1+x^2}\)
2
\(\frac{2}{1+x^2}\)
3
\(\rm -\frac{1}{1+x^2}\)
4
\(\rm \frac{1}{1+x^2}\)