atan in PHP2function ()

atan2The () function returns the arctangent of two variables.

syntax

atan2(val1,　val2)

parameter

• val1-divisor

• val2-dividend

returns

atan2The () function returns val in radians2 / val1The inverse tangent. The return value is in-Between Pi and Pi.

Example

<?php
　　　echo(atan2(30,30)　.　"<br>");
　　　echo(atan2(2,2)　.　"<br>");
?>

Output Result

0.78539816339745<br>0.78539816339745<br>

Example

Let's see another example-

<?php
　　　echo(atan2(-15,-15)　.　"<br>");
　　　echo(atan2(-0.90,-0.70)　.　"<br>");
?>

Output Result

-2.3561944901923<br>-2.2318394956456<br>