Calculates the arctangent of a number.
ATan ( expression )
Parameters
| expression | Any valid numeric expression. |
Return Value
Returns the trigonometric arctangent of expression. Result is in radians.
Remarks
The result of 4 * ATan(1) is pi.
Related
Sin, Cos, Tan, ASin, ACos
Example
$x = ATan(0.5)
$pi = 4 * ATan(1) ;equals 3.14159265358979
$radToDeg = 180 / $pi
$y = ATan(1) * $radToDeg ;arctangent of 1 returns 45░