Python Number acos() Method
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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.
Live Demo#!/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)
When we run above program, it produces following result −
acos(0.64) : 0.876298061168 acos(0) : 1.57079632679 acos(-1) : 3.14159265359 acos(1) : 0.0
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