PHP 忒聊
綴豖
ヶ輛
atan2
(PHP 3 = 3.0.5, PHP 4)
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).
See also acos() and atan().
綴豖
れ萸
ヶ輛
asinh
奻珨撰
atan