Perl | cos() Function

Last Updated : 25 Jun, 2019

This function is used to calculate cosine of a VALUE or $_ if VALUE is omitted. The VALUE should be expressed in radians.

Syntax: cos(VALUE)

Parameters:
VALUE in the form of radians

Returns: Function returns cosine of VALUE.

Example 1:

#!/usr/bin/perl 
  
# Calling cos function 
$var = cos(5); 
  
# Printing value of cos(5) 
print "cos value of 5 is $var"; 

Output:

cos value of 5 is 0.283662185463226

Example 2:

#!/usr/bin/perl 
  
# Calling cos function 
$var = cos(9); 
  
# Printing value of cos(9) 
print "cos value of 9 is $var"; 

Output:

cos value of 9 is -0.911130261884677

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