# How do you evaluate tan^-1 8.529?

Aug 6, 2016

tan^-1 8.529 = 83.31°

#### Explanation:

Either use a calculator or look up the value in tables.
This is known as arctan. You are looking for the angle which has 8.529 as its tan value.

Do not confuse this with $\frac{1}{\text{tan}}$ which is the same as Cot.

On a calculator you will probably need to use the 2nd function/shift key and then the tan key.

tan^-1 8.529 = 83.31°