alright so i need some help with these problems, and if you can let me know how you did them. that would be awesome.

1. Find sin(theta) when cos(theta) is -.53170 and theta is in quadrant 3.

2. Combine the parametric equations y=5cos(t) and x=3sin(t) into one equation relating y to x.

3. Solve for side a, b and angle B

/ \

/ \

22.7 / \a

/_________\

^ b