3.5.1.2.1 acos

Description

The acos(x) function returns the inverse of the corresponding trigonometric function. x must be within -1 and 1 for acos, or a missing value is returned. Returned values are in radians, degrees or gradians, depending upon (which can also be set in ).

Syntax

double acos(double x)

Parameter

x

is the value you want to get arccosine of. It must be in [-1, 1].

Return

Returns the inverse of the corresponding trigonometric function.

Example

aa = acos(1);
aa = ; //should return 0.

See Also

, , , , , ,