JavaScript - calculate sin in degrees

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In this article, we would like to show you a simple example of how to calculate sin in degrees in JavaScript.

Practical example

In order to use this example we just need to change the value of deg variable to some other value (in degrees).

// ONLINE-RUNNER:browser;

function calculateSin(deg) {
	var radians = (Math.PI / 180) * deg;
  	return Math.sin(radians);

var deg = 30;
var y = calculateSin(deg);

// sin(30 deg) = 0.49999999999999994
console.log('sin(' + deg + ' deg) = ' + y);


sin(30 deg) = 0.49999999999999994

We can change the value of deg.

Example of common calculations:

sin(0 deg) = 0
sin(15 deg) = 0.25881904510252074
sin(30 deg) = 0.49999999999999994
sin(45 deg) = 0.7071067811865475
sin(60 deg) = 0.8660254037844386
sin(90 deg) = 1

I've prepared a similar post but for calculation cos in degrees:

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JavaScript - math (popular problems)

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