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Python Number cos() Method
Description
Python number method cos() returns the cosine of x radians.
Syntax
Following is the syntax for cos() method −
cos(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.
Return Value
This method returns a numeric value between -1 and 1, which represents the cosine of the angle.
Example
The following example shows the usage of cos() method.
#!/usr/bin/python import math print "cos(3) : ", math.cos(3) print "cos(-3) : ", math.cos(-3) print "cos(0) : ", math.cos(0) print "cos(math.pi) : ", math.cos(math.pi) print "cos(2*math.pi) : ", math.cos(2*math.pi)
When we run above program, it produces following result −
cos(3) : -0.9899924966 cos(-3) : -0.9899924966 cos(0) : 1.0 cos(math.pi) : -1.0 cos(2*math.pi) : 1.0
python_numbers.htm
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