Use the unite circle to solve sin?=-1

Question

Use the unite circle to solve sinθ=-1 

Answer 1

From the unit circle we know that Sin(3∏/2)=-1

1. if you are solving for all real numbers then the answer would be θ = 3∏/2 +2k∏ k is any integer.
2. note that the answer can be written differently but the same any way.