Python Number acos() Method

Description

The method acos() returns the arc cosine of x, in radians.

Syntax

Following is the syntax for acos() method

acos(x)

Note: This function is not accessible directly so we need to import math module and then we need to call this function using math static object.

Parameters

• x -- This must be a numeric value in the range -1 to 1. If x is greater than 1 then it will generate an error.

Return Value

This method returns arc cosine of x, in radians.

Example

The following example shows the usage of 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)

Let us compile and run the above program, this will produce the following result:

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