# SIN()

## Effect

Returns the sine of a variable in radians.

## Syntax

`SIN(<Number>)`

## Parameter

`<Number>` can be a value, a numeric variable or an expression.

## Example

```basic
10 D1 = ATN(1)*8/360
20 PRINT "The sine of a 45 degree angle is ";SIN(45*D1)
30 PRINT "The sine of a 0 degree angle is ";SIN(0)
RUN
The sine of a 45 degree angle is .70710678118655
The sine of a 0 degree angle is 0
```

## Related to

`ATN()`, `COS()`, `TAN()`

## Compatibility

MSX-BASIC 1.0 or higher

## Source

Retrieved from "https://www.msx.org/wiki/SIN()"