Question

Use the inverse trigonometric keys on a calculator to find the measure of angle A.
22 m
15 m

Answer 1

I don’t see the diagram, so I’m not sure which side (15 or 22 m) is opposite, adjacent, or the hypotenuse to angle A. Tell me which side is which, or use one of these formulas and results depending on the labelling:

- If 15 m = opposite and 22 m = adjacent, tan A = 15/22 → A = arctan(15/22) ≈ 34.3°.
- If 15 m = opposite and 22 m = hypotenuse, sin A = 15/22 → A = arcsin(15/22) ≈ 43.0°.
- If 15 m = adjacent and 22 m = hypotenuse, cos A = 15/22 → A = arccos(15/22) ≈ 47.0°.

If you upload the diagram or say which side is opposite/adjacent/hypotenuse, I’ll give the single correct value.