← All built-ins / atan()
atan()
atan(mixed $number): float
Parameters
| Name | Type | Description |
|---|---|---|
| $number | float|int | tangent value |
Return value
Arctangent in radians.
Example
echo round(atan(1), 4), " ", round(atan(0), 3);
0.7854 0
| Name | Type | Description |
|---|---|---|
| $number | float|int | tangent value |
Arctangent in radians.
echo round(atan(1), 4), " ", round(atan(0), 3);
0.7854 0