What does $sin(arccos(5))+5sin(arc tan(2))$ equal?

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Answer 1 · 2016-08-14T02:21:01

Invalid expression.

Any cosine value $in [-1, 1]$ .

Here, in the first term, arc cos (5) is the angle whose

cosine is $5 > 1.$

And, so, invalid.

What does sin(arccos(5))+5sin(arc tan(2))sin(arccos(5))+5sin(arc tan(2)) equal?