Question

Use the inverse of cosine to find the approximate measure of the missing angle 0. A. 43. B. 59.5. C. 90. D.30.5.

Answer 1

I don’t have the cosine value or the diagram, so I can’t pick the correct choice yet. Please tell me the cosine ratio (adjacent/hypotenuse) or upload the triangle/figure.

Meanwhile, here’s how to do it and a quick check you can use:

- Formula: θ = cos⁻¹(adjacent/hypotenuse). Make sure your calculator is in degree mode.
- If you already have a numeric ratio r, compute θ = cos⁻¹(r).

For the four choices, the cosines are approximately:
- cos(43°) ≈ 0.731
- cos(59.5°) ≈ 0.506
- cos(90°) = 0
- cos(30.5°) ≈ 0.862

So if the given ratio is about 0.731 choose A, about 0.506 choose B, about 0 choose C, about 0.862 choose D. Share the ratio or image and I’ll pick the correct answer.