$\cos \left[ 2 \sin^{-1} \frac{-3}{4} + \cos^{-1} \frac{3}{4} \right] =$ - DASH

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Question

$\cos \left[ 2 \sin^{-1} \frac{-3}{4} + \cos^{-1} \frac{3}{4} \right] =$

$\frac{-3}{4}$

$\frac{3}{4}$

$\frac{3}{5}$

Does not exist

Solution

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