CPM Homework Help : INT3 Problem 10-57

Solve for $x$ in each of the following triangles. What methods can be used for calculating unknown parts of triangles?

Hint:

What laws and theorems relate the angles of a triangle to the sides?
Or relate the lengths of the sides of a triangle to each other?
Use them to help you find the unknown parts of these triangles.

Hint (a):
Which trigonometric ratio relates the side opposite the angle to the side adjacent to it?
Answer (a):
$x ≈ 80.86$

Hint (b):
Use the Law of Sines.

Hint (c):
Use the Law of Cosines.
Answer (c):
$x ≈ 15.50^\circ$