1 | initial version |

A degree is easily converted in radian (360° versus $2\pi$)

```
sage: cos(52 / 360 * (2*pi))
cos(13/45*pi)
```

While this is perfectly correct, this is not very useful in order to get a numerical approximation of it you can do

```
sage: c = cos(52 / 360 * (2*pi))
sage: c.numerical_approx()
0.615661475325658
```

2 | No.2 Revision |

A degree is easily converted in radian (360° versus $2\pi$)

```
sage: cos(52 / 360 * (2*pi))
cos(13/45*pi)
```

While this is perfectly correct, this is not very ~~useful in ~~useful. In order to get a numerical approximation ~~of it ~~you can do

```
sage: c = cos(52 / 360 * (2*pi))
sage: c.numerical_approx()
0.615661475325658
```

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