Teaching AWES Army Public School TGT Mock Test 2024 Mathematics Differential Calculus Evaluation of derivatives
If y = \(\rm \cos ^ {-1} \left(\frac {1 - x}{1 + x}\right)\), then find \(\rm\frac{dy}{dx}\).
1
\(\rm2\over {1 + x}\)
2
\(\rm 1\over {\sqrt x (x + 1)}\)
3
\(\rm 1\over {x \sqrt{x + 1}}\)
4
\(\rm1\over {1 + x}\)