Question

Which is equivalent to cos-1(0)? give your answer in radians.

Answer 1

If cos90 is equivalent to zero, hence the cos inverse of 0 is 90 degrees which is equivalent to pi/2 in radians

Inverse of trigonometry function

Inverse of a function are the opposite of the function. Given the inverse of cosine function as shown:

$cos^{-1}x$

If x = 0, hence;

$cos^{-1}{0$

If cos90 is equivalent to zero, hence the cos inverse of 0 is 90 degrees which is equivalent to pi/2 in radians

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