# TAN

Formulas / TAN
Calculate the tangent of an angle.
TAN(number)
• number - required argument, the angle in radians

## Examples

• =TAN(PI()/4)

The TAN function can take an angle in radians and return the tangent of that angle. For example, to return the tangent of 45 degrees, you would use the formula above. This formula will return the value 1.0.

• =TAN(60*PI()/180)

The TAN function can also take an angle in degrees and return the tangent. To calculate the tangent of 60 degrees, use the formula above. This will return the same value as the previous example, 1.0.

## Summary

The TAN function is used to calculate the tangent of an angle given in radians. It returns the tangent of the given angle as its result.

• The angle must be supplied in radians to get the tangent of an angle using the TAN function. It can also be used to calculate the tangent of a full rotation.
• The TAN function has asymptotes at the range [0,2Ï€].
• The TAN function can be equivalently defined using SIN and COS.