Perl Programming/Keywords/cos

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The cos keyword

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

Syntax

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  cos(X)

Examples

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  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:


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