Question:medium

$ \cos^{-1}\left(\frac{-1}{2}\right) - 2\sin^{-1}\left(\frac{1}{2}\right) + 3\cos^{-1}\left(\frac{-1}{\sqrt{2}}\right) - 4\tan^{-1}(-1) $ equals

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$\cos^{-1}(-x) = \pi - \cos^{-1}x$.

Updated On: Apr 10, 2026

$\frac{19\pi}{12}$
$\frac{35\pi}{12}$
$\frac{47\pi}{12}$
$\frac{43\pi}{12}$

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The Correct Option is D

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\( \cos^{-1}\left(\frac{-1}{2}\right) - 2\sin^{-1}\left(\frac{1}{2}\right) + 3\cos^{-1}\left(\frac{-1}{\sqrt{2}}\right) - 4\tan^{-1}(-1) \) equals

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The Correct Option is D

Solution and Explanation

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