Side a=17 angle B = 89 side c=24, find measure of angle C using law of cosins?

Question

can someone point me in the right direction?

Answer 1

Step 1:

The sides of the triangle are and .

The angle is .

Apply cosine rule: .

Substitute , and .

.

Step 2:

Find angle .

Apply cosine rule: .

Substitute , and .

.

The angle is .

Solution:

.