Question

Use the inverse of cosine to solve for the missing angle, rounded to the nearest whole degree. The numbers are 5, 4, and 3. A. 37. B. 53. C. 1. D.90.

Answer 1

Assuming 5 is the hypotenuse and 4 is the adjacent side, cos(θ) = 4/5.
θ = cos⁻¹(4/5) = cos⁻¹(0.8) ≈ 36.87° ≈ 37°.

Answer: A. 37.