Given Triangle ABC: Right Triangles

Question

1. If a = 6 and <B = 53º, find b, c, and <A
2. If c = 13 and b = 12, find a, <A, and <B
3. If <A = 20º and b = 10, find <B, a and c
4. If c = 30 and <A = 40º, find <B, a

Answer 1

These are right triangles, so angle C is 90

1. isnt CosineB=a/c so you can solve for c. Then, solve for b.

I will be happy to critique your thinking.