Perl Programming/Keywords/sin

The `sin` keyword

sin is the trigonometric function sine that assumes that X is in radians.

  sin(X)

The code

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

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

prints the sine of the angle of 30 degrees:

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