What does $-cos(arcsin(15))+2sec(arctan(12))$ equal?

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Answer 1 · 2016-07-28T09:27:54

arc sin 15 = angle whose sine is 15, A sine value cannot exceed 1.
So, the given expression is an invalid expression.

For any angle a, $sin a in [-1, 1]$ Here sine of an angle is 15.

What does -cos(arcsin(15))+2sec(arctan(12))-cos(arcsin(15))+2sec(arctan(12)) equal?