Teaching UP TGT Mock Test Series 2025 Mathematics Differential Calculus Evaluation of derivatives

If y = sec(tan-1x), then \(\frac{{dy}}{{dx}}\) at x = 1 is

1
\(\frac{1}{2}\)
2
1
3
\(\sqrt 2 \)
4
\(\frac{1}{{\sqrt 2 }}\)
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