ATAN2(3) 1 ATAN2(3)
atan2 - Arc tangent of two variables
SYNOPSIS
float atan2 (float $y, float $x)
DESCRIPTION
This function calculates the arc tangent of the two variables $x and $y. It is similar to calculating the arc tangent of $y / $x, except
that the signs of both arguments are used to determine the quadrant of the result.
The function returns the result in radians, which is between -PI and PI (inclusive).
PARAMETERS
o $y
- Dividend parameter
o $x
- Divisor parameter
RETURN VALUES
The arc tangent of $y/$x in radians.
SEE ALSO
atan(3).
PHP Documentation Group ATAN2(3)
