JavaScript Tutorial JavaScript References

JavaScript - Math.sin() Method



The JavaScript Math.sin() method returns trigonometric sine of an angle (angle should be in radians). In the graph below, sin(x) vs x is plotted.

Sin Function

Syntax

Math.sin(x)

Parameters

x Specify the angle in radian.

Return Value

Returns the trigonometric sine of an angle.

Example:

In the example below, Math.sin() method is used to find out the trigonometric sine of an angle.

//Math.PI - value of PI from Math object
var pi = Math.PI;
var txt;

txt = "Math.sin(pi/6) = " + Math.sin(pi/6) + "<br>";
txt = txt + "Math.sin(pi/4) = " + Math.sin(pi/4) + "<br>";
txt = txt + "Math.sin(pi/3) = " + Math.sin(pi/3) + "<br>";

The output (value of txt) after running above script will be:

Math.sin(pi/6) = 0.49999999999999994
Math.sin(pi/4) = 0.7071067811865475
Math.sin(pi/3) = 0.8660254037844386

❮ JavaScript - Math Object

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