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Find the derivative of the function:

$$y=cos(x)+2sin^{-1}(x)$$

$\sin(x)+\frac{2}{\sqrt(1-x^2)}$

$-\sin(x)+\frac{2}{\sqrt(1-x^2)}$

$-\sin(x)+\frac{1}{2 \sqrt(1-x^2)}$