---
title: sin
card_id: 64752
---

# sin

```
the sin of [ph:number]
```

Value returned: a number equal to the trigonometric sine of `[ph:number]` expressed in radians

Note: There are 2 * pi radians in 360 degrees. 

## Examples

```
the sin of 0  -- returns 0
the sin of (pi / 4) -- returns 0.707107
the sin of pi -- returns 0
the sin of pi / 2  -- returns 0
the sin of (pi / 2) -- returns 1
```

## Related Topics

* [atan](/HyperTalkReference/functions/atan)
* [cos](/HyperTalkReference/functions/cos)
* [numberFormat](/HyperTalkReference/properties/numberFormat)
* [tan](/HyperTalkReference/functions/tan)