ATAN
Applies to: 
Calculated column
Calculated table
Measure
Visual calculation
Returns the arctangent, or inverse tangent, of a number. The arctangent is the angle whose tangent is number. The returned angle is given in radians in the range -pi/2 to pi/2.
Syntax
ATAN(number)
Parameters
| Term | Definition |
|---|---|
| number | The tangent of the angle you want. |
Return value
Returns the inverse hyperbolic tangent of a number.
Remarks
To express the arctangent in degrees, multiply the result by 180/PI( ) or use the DEGREES function.
Example
| Formula | Description | Result |
|---|---|---|
| = ATAN(1) | Arctangent of 1 in radians, pi/4 | 0.785398163 |
| = ATAN(1)*180/PI() | Arctangent of 1 in degrees | 45 |