For if you're stuck on that last problem:
Sin (Sine) is the value opposite (but never the largest side) of X divided by the largest side (line XY)
Cos (Cosine) is the value adjacent (but never the largest side) to X divided by the largest side (line XY)
Tan (Tangent) is the value opposite (but never the largest side) of X divided by the value adjacent (but never the largest side) to X
h (Hypotenuse) will come in handy later, it is always the longest side which is line XY in this case, with value 16
So in this case,
Sin = 8 divided by 16
Cos = 8-Г3 (about 13.86) divided by 16
Tan = 8 divided by 8-Г3 (about 13.86)
Which comes out to,
Sin = 1/2
Cos = about 0.87
Tan = about 0.58