# Math Help - Help with inverse trigonometric equation

1. ## Help with inverse trigonometric equation

cos-1 + tan-1 = π/2

Where do I begin with this?

2. ## Re: Help with inverse trigonometric equation

Originally Posted by cdbowman42
cos-1 + tan-1 = π/2

Where do I begin with this?
$\cos^{-1}(of \, what?) + \tan^{-1}(of \, what?) = \frac{\pi}{2}$

sorry,