Question

Find the measure of angle A.
54.99
35.1°
50.7°
39.3°

Answer 1

35.1°

Explanation:

Answer 2

Hi there!

`\large\boxed{35.1^o}}`

We can once again use right triangle trig:

We are given the hypotenuse and adjacent sides, so cosine must be used:

cosA = A / H

thus:

cosA = 9/11

Use inverse trig to solve:

cos⁻¹(9/11) ≈ 35.1°