Question

What does `-sin(arccos(2))+tan(arccos(4))` equal?

Answer 1

arc cos means 'angle whose cosine is'. Cosine/sine values are in [ `-`1, +1 ] only. 2 and 4 are inadmissible values.

Explanation:

arc cos means 'angle whose cosine is'. Cosine/sine values are in [ `-`1, +1 ] only. 2 and 4 are inadmissible values.

The expression is an invalid expression.