What does #3cos(arcsin(5))-6sec(arctan(5))# equal?
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"How do you evaluate #sin^-1 (-sqrt3/2)#?"
1 Answer
May 28, 2016
arc sin 5 is invalid arc sin. I have given this answer many a time to such questions on values of expressions carrying invalid arc sin and invalid arc cos.
Explanation:
Let a = arc sin 5. Then sin a = 5 > 1. So, arc sin 5 is invalid.
For any a,
