# CoffeeScript Math - sin()

## Description

The sin() method accepts a number and returns its sine value which is between -1 and 1.

## Syntax

Given below is the syntax of sin() method of JavaScript. We can use the same method in the CoffeeScript code.

```Math.sin( x )
```

## Example

The following example demonstrates the usage of the sin() method in CoffeeScript. Save this code in a file with name sin.coffee.

```value = Math.sin 90
console.log "The sine value of 90 is : " + value

value = Math.sin 0.5
console.log "The sine value of 0.5 is : " + value

value = Math.sin 2*Math.PI/2
console.log "The sine value of 2*Math.PI/2 is : " + value
```

Open the Node.js command prompt and compile the .coffee file as shown below.

```c:\> coffee -c math_sin.coffee
```

On compiling, it gives you the following JavaScript.

```// Generated by CoffeeScript 1.10.0
(function() {
var value;

value = Math.sin(90);

console.log("The sine value of 90 is : " + value);

value = Math.sin(0.5);

console.log("The sine value of 0.5 is : " + value);

value = Math.sin(2 * Math.PI / 2);

console.log("The sine value of 2*Math.PI/2 is : " + value);

}).call(this);
```

Now, open the command prompt again, and run the CoffeeScript file as shown below.

```c:\> coffee math_sin.coffee
```

On executing, the CoffeeScript file produces the following output.

```The sine value of 90 is : 0.8939966636005579
The sine value of 0.5 is : 0.479425538604203
The sine value of 2*Math.PI/2 is : 1.2246467991473532e-16
```
coffeescript_math.htm