acos()

Read(227) Label: arc consine,

Description:

Compute the arc cosine value of the parameter.

Syntax:

acos(number)

Note:

The parameter number is a real number between -1 and 1.

Parameters:

number

The real number for which you want to compute the arc cosine

Return value:

Arc cosine

Example:

acos(-1)

3.141592653589793

acos(cos(pi()/2)) 

1.5707963267948966

acos(cos(0))

0.0

Related functions:

asin()

atan()