No way to disable it, but you can tweak your correctness check to distinguish between the different forms. For that particular answer,

```
i=inputName.latex
correct = numericValue("\round(${i},3)")=0.908 and
(countNumberUsage(i)=1
or (countNumberUsage(i,3)=2 and countNumberUsage(i,2)=1 and
countNumberUsage(i,13)=1)
)
```

So, first checking if rounded the value is correct to 3 decimal places, then if there’s one number (i.e. 0.908), or if 3 is present twice, and 2 and 13 are present, once each, in the answer. So, the trig answer will be marked incorrect because it doesn’t have the right number usage.

You could also identify the trig answer in a similar way to give some specific feedback if you felt inclined.