# Finding angles

**The inverse of sin**

The inverse of sin can be found using a calculator and is also called the arcsin. For example:

sin 30° = 0.5

sin¯¹ 0.5 = 30°

**The inverse of cos**

The inverse of cos can be found using a calculator and is also called the arccos. For example:

cos 60° = 0.5

cos¯¹ 0.5 = 60°

**The inverse of tan**

The inverse of tan can be found using a calculator and is also called the arctan. For example:

tan 45° = 1

tan¯¹ 1 = 45°