Was good but...

It worked wonderfully up until recently when I was using sine and cosine. They had calculated correctly days before then but now they give me incorrect answers. I have gone over the equation and put them in exactly the same on different calculators and gotten the correct answer. I have rewritten the problem and still no good. Yes it is in degree mode and yes I am positive that the answers I got on other calculators were correct. If there is something I am doing wrong please let me know.

BDJSISH about EduCalc Classic, v8.0