Question: In triangle MNO, if MN = 12 cm, NO = 16 cm, and angle M = 60 degrees, what is the length of MO using the Law of Cosines?
Options:
Correct Answer: 10 cm
Solution:
Using the Law of Cosines: MO² = MN² + NO² - 2 * MN * NO * cos(M). MO² = 12² + 16² - 2 * 12 * 16 * cos(60°) = 144 + 256 - 192 = 208. Thus, MO = √208 = 10 cm.