Perl Programming/Keywords/cos

The cos keyword

cos is the trigonometric function cose that assumes that X is in radians.

Syntax

  cos(X)

Examples

The code

*PI = \3.1415926535;
$a = 30;	# in degrees
$cos = cos($a/180*$PI);

print "cos(" . $a . "°) = " . $cos . "\n";

prints the cosine of the angle of 30 degrees: