If \( y=\tan ^{-1}(\sec x+\tan x) \) then \( \frac{d y}{d x}=? \) (a) \( \frac{1}{2} \) (b) \( \...

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If \( y=\tan ^{-1}(\sec x+\tan x) \) then \( \frac{d y}{d x}=? \)
(a) \( \frac{1}{2} \)
(b) \( \frac{-1}{2} \)
(c) 1
(d) none of these
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