Perl Programming/Keywords/cos
Appearance
The cos keyword
[edit | edit source]cos is the trigonometric function cose that assumes that X is in radians.
Syntax
[edit | edit source] cos(X)
Examples
[edit | edit source] The code
prints the cosine of the angle of 30 degrees:
*PI = \3.1415926535;
$a = 30; # in degrees
$cos = cos($a/180*$PI);
print "cos(" . $a . "°) = " . $cos . "\n";