Question

If y = arc cos x, then x is

Answer 1

Answer on Question #52188– Math – Algebra

Question

If $y = \arccos x$, then $x$ is

Solution

By properties of the inverse of cosine function, if $y = \arccos x$ then $0 \leq y \leq \pi$, $-1 \leq x \leq 1$.

Arccosine is the inverse of cosine. It means the following:

If $y = \arccos x$, then $x = \cos y$.

**Answer**: $x = \cos y$.

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