## sin function - calculate the sine value

**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.