Question

Use the inverse of cosine to find the missing angle. Round your answer to the nearest tenth. The numbers are 50 and 27. 0=_

Answer 1

Assuming 27 is the adjacent side and 50 the hypotenuse, cos θ = 27/50 = 0.54.
θ = arccos(27/50) ≈ arccos(0.54) ≈ 57.3°.