Example from my homework:

**Solve for values of between 0**

^{o}and 90^{o}.If Cos =, find Sin.

Where exactly would I start with this equation? I was thinking I would use the Pythagorean identity "Sin

^{2}+Cos

^{2}=1"; however, I am not sure.

How would I solve this problem if the value of is between 180

^{o}and 270

^{o}. What about between 270

^{o}and 360

^{o}?