If f x -tan -1cos x -sin x -cos x -sin x - then f -0-A- 1B- -1C- -2D- 2

The correct option is B 1 f(x)=tan^ 1 ( cosx sinx/cosx+sinx )=tan^ 1 ( tan ( π/4 x ) )=π/4 x f'(x)= 1 f'(0)= 1 ...

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Addition Rule of Differentiation

If f x =tan -...

Question

$I f f (x) = t a n^{- 1} (\frac{c o s x - s i n x}{c o s x + s i n x}), t h e n f^{'} (0) =$

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