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Perl Programming/Keywords/cos
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Perl CORE crypt Keywords
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: 0.866025403791921
Perl CORE crypt Keywords