What does $sin(arccos(4))-2cos(arc csc(2))$ equal?

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Answer 1 · 2016-06-12T06:16:49

There is something inappropriate in the given problem. The part containing $arccos(4)$ is not possible. There is no angle with cosine value $=4$ .

Please check the problem.

What does sin(arccos(4))-2cos(arc csc(2))sin(arccos(4))-2cos(arc csc(2)) equal?