Hi OSTexo, it looks like you are missing an operator after the "20" part, here:
code:
20 sin(180/10)/(1 - sin(180/10))
^
If that's meant to be a multiplication you'll have to put in a * symbol at that point, basically for computer code math formulas anytime you want a multiplication you have to use the * symbol, it won't work to just stick things next to each other like it is in regular math formulas. So for example you can't write: 5(x-1) you have to write: 5*(x-1).
Hope that helps!
- Michael
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