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Evaluate \(\cos \begin{Bmatrix}\cos^{-1}\left(\frac{-\sqrt{3}}{2}+\frac{\pi}{6}\right)\end{Bmatrix}.\) |
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Answer» \(\cos \begin{Bmatrix}\cos^{-1}\left(\pi-\frac{\pi}{6}+\frac{\pi}{6}\right)\end{Bmatrix}.\) \(=\cos\{\pi\}\) \(=\cos\left(\frac{\pi}{2}+\frac{\pi}{2}\right)\) = -1 |
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