Given two sides of a right triangle, I can find all angles using inverse trig. operations.
1) Identify the reference angle.
2) Label only the sides given and asked for as (O, A, or H).
3) Choose the correct trig. equation to set up according to your labels in 2).
4) Solve the equation using inverse operations:
♦ If x is high, just multiply.
♦ If x is low, divide by the trig operation below.
♦ If you need the angle though, just trig inverse the ratio.