CPM Homework Help : PC3 Problem 7-119

Solve each triangle below.

Hint:

The given information in both of these triangles is $\text{SSA}$ , so use the Law of Cosines to determine if there are $0$ , $1$ , or $2$ possible triangles.

Step (a):
$18^2=9^2+a^2-2(9)(a)\cos(88^\circ)$

Step (b):
$13^2=30^2+a^2-2(30)(a)\cos(542^\circ)$