Python acos() Function

Python Numbers

Description

acos()Returns the arc cosine of x, in radians.

Syntax

The syntax for the acos() method is:

import math

math.acos(x)

Note:acos() cannot be accessed directly; you need to import the math module and then call the method via the math static object.

Parameters

• x -- A value between -1 and 1. If x is greater than 1, an error will occur.

Return Value

Returns the arc cosine of x, in radians.

Example

The following example demonstrates the use of the acos() method:

#!/usr/bin/python
import math

print "acos(0.64) : ",  math.acos(0.64)
print "acos(0) : ",  math.acos(0)
print "acos(-1) : ",  math.acos(-1)
print "acos(1) : ",  math.acos(1)

The output of the above example is:

acos(0.64) :  0.876298061168
acos(0) :  1.57079632679
acos(-1) :  3.14159265359
acos(1) :  0.0

Python Numbers