Solve : cos−1(cos67π)

cos−1cos67π=cos−1cos(π+6π)=cos−1cos(−6π)=cos−123=6π

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Solve : { ^{ - 1}}( { {{7 }}{6}} )

Question

Solve : $cos^{- 1} (cos \frac{7 π}{6})$

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Solve :

cos^{- 1} (cos \frac{7 π}{6})

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6 mins ago

cos^{- 1} cos \frac{7 π}{6}

= cos^{- 1} cos (π + \frac{π}{6})

= cos^{- 1} cos (- \frac{π}{6})

= cos^{- 1} \frac{3}{2}

= \frac{π}{6}

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