Home -> Solved problems -> Calculate cos(arccos(pi))

Solution

The arccosine of \(x\) is defined as the inverse cosine function of \(x\) when \(-1≤x≤1\): \[\arccos x=\cos ^{-1} x\]

\(\pi \notin[-1,1]\) thus \(\cos ^{-1} \pi\) is undefined therefore \(\cos (\cos ^{-1} \pi)\) is undefined.

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Home -> Solved problems -> Calculate cos(arccos(pi))

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