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How do you calculate ${cos}^{- 1} (cos (- 0.5))$ $cos^-1(cos(-0.5))$ ?

1 Answer

Nov 24, 2016

-0.5

Explanation:

Let ${cos}^{- 1} [cos (- 0.5)] = A$ $Cos^-1[Cos(-0.5)]=A$

Cos A=Cos(-0.5)

A= -0.5

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