Question

In angleABC, AB = 4.12, BC = 4, AC = 5. What is m 2 C?

A.25
B. 37.5
C. 43.93
D. 53.08

Answer 1

cos(C) = (4.12^2 + 4^2 - 5^2) / (2(4.12)(4)) ≈ 0.8197

C ≈ 36.99°

To find 2C, we simply multiply C by 2:

2C ≈ 73.98°

Therefore, the correct answer is D. 73.98.