Perl | cos() Function

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