## How to use the TAN function

*Article last updated on June 16, 2018*

The TAN function calculates the tangent of an angle.

Formula in cell C3:

### Excel Function Syntax

TAN(*number*)

### Arguments

number |
Required. The radian angle you want to know the tangent of. |

### Comments

Use the RADIANS function to convert degrees to radians.

### Functions in 'Math and trigonometry'

The TAN function function is one of many functions in the 'Math and trigonometry' category.

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