I can't get how to work with series. I do

```
sage: R.<t> = PowerSeriesRing(QQ)
sage: t^2
t^2
sage: sin(t)
```

but the last rises an error. I want to do usual manipulations like sin(t)/cos(t+2)^2.

1 | initial version |

I can't get how to work with series. I do

```
sage: R.<t> = PowerSeriesRing(QQ)
sage: t^2
t^2
sage: sin(t)
```

but the last rises an error. I want to do usual manipulations like sin(t)/cos(t+2)^2.

2 | No.2 Revision |

I can't get how to work with series. I do

```
sage: R.<t> = PowerSeriesRing(QQ)
sage: t^2
t^2
sage: sin(t)
```

but the last rises an error. I want to do usual manipulations like ~~sin(t)/cos(t+2)^2.~~`sin(t)/cos(t+2)^2`

.

Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.