I have been using my Classpad 300PLUS for maybe 2 years. Although I many times used solve option of it, last day it did not work. I wrote the following into classpad:

**solve(sin(x)=1,x)**

But it gave me a solution like

**{x=360constn(1)+90}**

But i don't want a solution like this. I want

**x=90**when it is in degree format. Also my calculator gives same kind of different results for equations including sin, cos, tan...

What is the problem friends? Please help me.