Questions asked by Song A.

Questions asked by Song A.

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Show that the tangent to $f (x) = sin x$ $f(x) = sinx$ at $x = 1$ $x=1$ and the tangent to $g (x) = {sin}^{- 1} x$ $g(x) = sin^-1x$ at $y = 1$ $y=1$ are equally inclined to $y = x$ $y=x$ ?