1. Home

JavaScript Math sin() Method

Math.sin(x) expect x in radians

Definition and Usage

The Math.sin() method returns the sine of a number.

The Math.sin() method returns a number between -1 and 1.

The Math.sin() method expects the number in radians.

What is Radians?

Radians is an angle's α amount of rotation b on a circle:
DegreesPIRadians
0°00
1°PI/1800.0175
30°PI/60.52
45°PI/40.79
90°PI/21.57
180°PI3.14
360°PI*26.28

JavaScript Sine and Cosine Methods:

The Math.sin() Method
The Math.sinh() Method
The Math.asin() Method
The Math.asinh() Method

The Math.cos() Method
The Math.cosh() Method
The Math.acos() Method
The Math.acosh() Method

Syntax

Math.sin(x)

Parameters

Parameter Description
x Required.
A number representing radians.

Return Value

Type Description
Number -1 to 1. The sine of the number.
NaN if the parameter is not numeric.

The Pythagoran Therorem

Math.sin(), Math.cos(), and Math.tan() are related to the Pythagorean theorem:
Theorem: c2 = a2 = b2

The sine Math.sin() to the angle is a / c.

The cosine Math.cos() to the angle is b / c.

The tangent Math.tan() to the angle is a / b.

Related Pages:

JavaScript Math

JavaScript Numbers

JavaScript Number Reference

Browser Support

Math.sin() is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:

Chrome IE Edge Firefox Safari Opera
Yes Yes Yes Yes Yes Yes

Categories

HTML CSS3 Bootstrap Foundation Sass JavaScript TypeScript JQuery AngularJS React NodeJS Highcharts PHP Python Python3 Django Linux Docker Ruby Java C C ++ Perl Servlet JSP Lua Scala Go ASP C # SQL MySQL SQLite MongoDB Redis Android Swift ionic Kotlin XML tutorial

Contact US