atan2
atan2
(PHP 4, PHP 5, PHP 7)
atan2 — Arc tangent of two variables
Description
float atan2 ( float $y , float $x )
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
y
Dividend parameter
x
Divisor parameter
Return Values
The arc tangent of y/x in radians.
See Also
- atan() - Arc tangent
← asinh
atan →
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