Overview
Grammar | ATAN(number) | Calculates the arctangent, or inverse tangent, of a number. The parameter number is the tangent of the returned angle, which is expressed in radians. |
Parameter | number | The tangent of the angle you want. |
Notes
The function supports only one number and returns illegal if more than one numbers are set.
The returned angle is between -pi/2 and pi/2 (exclusive). To express the returned angle in degrees, multiply the result by 180/PI().
Example
| Formula | Result | Notes |
|---|---|---|
| ATAN(-1) | -0.785398163 (-pi/4 radian) | |
| ATAN(0) | 0 (radian) | |
| ATAN(2)*180/PI() | 63.43494882 (degrees) |
