What does $- 3 sin (arccos (2)) - cos (a r c cos (3))$ $-3sin(arccos(2))-cos(arc cos(3))$ equal?

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Answer 1 · 2016-01-16T14:00:03

This expression is meaningless.

The function $arccos (x)$ $"arccos"(x)$ is only defined for $x \in [- 1, + 1]$ $x in [-1,+1]$

What does −3sin(arccos(2))−cos(arccos(3))-3sin(arccos(2))-cos(arc cos(3)) equal?