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Write the value of \( \cos^{-1} \bigg( \cos\large\frac{7\pi}{6} \bigg). \)

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\[Cos^{-1}Cos(\pi+\frac{\pi}{6})=Cos^{-1}Cos(\pi-\frac{\pi}{6})\]

\[=\frac{5\pi}{6}\]
answered Feb 14, 2013 by rvidyagovindarajan_1
 
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