sin function calculates the sine value. The angle is specified by arc degree method using π (pi function).
use Math::Trig 'pi'; sin(pi/2);
The pi function is defined in Math::Trig module.
sin function programming example
The following is a sin function programming example.
use strict; use warnings; use Math::Trig 'pi'; # sin(90°) = 1; print "sin(π/2) = " . sin(pi/2) . "\n";
Other trigonometric functions
Perl also has cos function in core functions.
The following article explains how to use other trigonometric functions such as tangent.