ACos

Description

Calculates the arc cosine of an angle.

Syntax

ACos ( n )

Argument

Description

n

The ratio of the lengths of two sides of a triangle for which you want a corresponding angle (in radians). The ratio must be a value between -1 and 1.


Return value

Double. Returns the arc cosine of n if it succeeds.

Examples

This expression returns 0:

ACos(1)

This expression returns 3.141593 (rounded to six places):

ACos(-1)

This expression returns 1.000000 (rounded to six places):

ACos(.540302)

See also

Cos

ASin

ATan