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# What is Math.sin() in JavaScript? Arslan Bajwa

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In JavaScript, Math is a built-in object that contains different methods and properties used to perform mathematical operations. It contains a sin() function, which is used to compute the sine of a specified angle.

## Syntax

Math.sin(param);

## Parameter

• param: This is the angle for which we want to compute the sine. Its type is Number and it is measured in radians.

Number in JavaScript is a 64-bit double-precision value which is the same as double in C# or Java.

## Return value

• Number: It returns the sine of the given angle stored in param. It is of Number type. Its range is:

• -1 <= result <= 1
• NaN: The function returns NaN if param is positive or negative Infinity.

To convert degrees to radians, use the following formula.

• Radians = Degrees x π /180

where π = 3.14159, approximately.

## Example

console.log("sin(-1) = " + Math.sin(-1));console.log("sin(0) = " + Math.sin(0));console.log("sin(1) = " + Math.sin(1));console.log("sin(∞) = " + Math.sin(Infinity));console.log("sin(-∞) = " + Math.sin(-Infinity));

### Output

• sin ( -1 ) = -0.8414709848078965
• sin ( 0 ) = 0
• sin ( 1 ) = 0.8414709848078965
• sin ( ∞ ) = NaN
• sin ( -∞ ) = NaN

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CONTRIBUTOR Arslan Bajwa

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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