MATLAB Function Reference |

Sine of an argument in radians

**Syntax**

**Description **

The `sin`

function operates element-wise on arrays. The function's domains and ranges include complex values. All angles are in radians.

```
Y = sin(X)
```

returns the circular sine of the elements of `X`

.

**Examples**

Graph the sine function over the domain .

The expression `sin(pi)`

is not exactly zero, but rather a value the size of the floating-point accuracy `eps`

, because `pi`

is only a floating-point approximation to the exact value of .

**Definition**

**Algorithm**

`sin`

uses FDLIBM, which was developed at SunSoft, a Sun Microsystems, Inc. business, by Kwok C. Ng, and others. For information about FDLIBM, see http://www.netlib.org.

**See Also**

sign | sind |

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