Question

How do you find the angle lengths of a right triangle if you know all the sides?

Answer 1

By using the inverse trig functions

You use sin, cos, and tan when you have the angle measurement and want to find a side length..

you use arcsin, arccos, and arctan when you have the side lengths but need the angle measurement

\[\arcsin = \sin^{-1} \]
\[\arccos = \cos^{-1} \]
\[\arctan = \tan^{-1} \]