Tangent calculator

This calculator works out the tangent of an angle. You can enter the angle in degrees or in radians; choose the unit next to the field.

What the tangent function is

The tangent of an angle alpha is equal to sine alpha divided by cosine alpha, that is

$$\tan (\alpha )=\frac{\sin \alpha }{\cos \alpha }$$

You can find more details in the article on trigonometric functions.