trader_acos
(PECL trader >= 0.2.0)
trader_acos — Vector Trigonometric ACos
说明
trader_acos
( array
$real
) : array
Calculates the arc cosine for each value in
real and returns the resulting array.
参数
-
real -
浮点数数组。
返回值
Returns an array with calculated data or false on failure.