Uncaught divisions by zero

[Former user]

Originally reported on Google Code with ID 85 ``` After adding divsion by zero checking in testevaluator, I realized some expressions fail:

1/sin(pi) 1/sin pi 1 / cos 0 1/cos(0) 1/cos(pi/2)

But these succeed:

1/0 1 / sin 0 1/sin ( pi -1/trunc(0,123) 1/round(0,456) -1/binompmf(1;10;0)

```

Reported by `helder.pereira.correia` on 2007-07-23 07:54:29

[Former user]

``` Obviously, the ones like 1/cos(0) are to be ignored.

BTW, in testhmath, the same tests succeed. ```

Reported by `helder.pereira.correia` on 2007-07-23 08:16:24

[Former user]

``` In testevaluator, the angle mode was set to Degrees, that's why... ```

Reported by `helder.pereira.correia` on 2007-07-23 23:12:57 - Status changed: `Invalid`