1 | initial version |

Thanks for reporting ! However, it is fixed in recent beta releases of Sage, see:

```
sage: integral(sqrt(1-cos(x)), x, 0, pi)
2^(3/2)
```

http://sagecell.sagemath.org/?z=eJzLzCtJTS9KzNEoLiwq0TDUTc4v1qjQ1NRRqNBRMNBRKMjUBADPVgqU&lang=sage

2 | No.2 Revision |

Thanks for ~~reporting ! However, it ~~reporting, this is ~~fixed in recent beta releases of Sage, see:~~now trac ticket 24587 !

```
sage: integral(sqrt(1-cos(x)), x, 0, pi)
2^(3/2)
```

http://sagecell.sagemath.org/?z=eJzLzCtJTS9KzNEoLiwq0TDUTc4v1qjQ1NRRqNBRMNBRKMjUBADPVgqU&lang=sage

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