Math.sin()

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

{{InteractiveExample("JavaScript Demo: Math.sin()")}}

```js interactive-example function getCircleY(radians, radius) { return Math.sin(radians) * radius; }

console.log(getCircleY(1, 10)); // Expected output: 8.414709848078965

console.log(getCircleY(2, 10)); // Expected output: 9.092974268256818

console.log(getCircleY(Math.PI, 10)); // Expected output: 1.2246467991473533e-15

## Syntax

```js-nolint
Math.sin(x)

Parameters#

• x
• : A number representing an angle in radians.

Return value#

The sine of x, between -1 and 1, inclusive. If x is {{jsxref("Infinity")}}, -Infinity, or {{jsxref("NaN")}}, returns {{jsxref("NaN")}}.

Description#

Because sin() is a static method of Math, you always use it as Math.sin(), rather than as a method of a Math object you created (Math is not a constructor).

Examples#

Using Math.sin()#

Math.sin(-Infinity); // NaN
Math.sin(-0); // -0
Math.sin(0); // 0
Math.sin(1); // 0.8414709848078965
Math.sin(Math.PI / 2); // 1
Math.sin(Infinity); // NaN

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("Math.acos()")}}
• {{jsxref("Math.asin()")}}
• {{jsxref("Math.atan()")}}
• {{jsxref("Math.atan2()")}}
• {{jsxref("Math.cos()")}}
• {{jsxref("Math.tan()")}}
• CSS {{cssxref("sin()")}} function