Question

Can someone help me?

Answer 1

Option (3)

Explanation:

Let the unknown angle of the triangle measure x°.

By applying cosine rule in the right triangle,

cos(x) =
`\frac{\text{Adjacent side}}{\text{Hypotenuse}}`

cos(x) =
`(33)/(65)`

x =
`\text{cos}^(-1)((33)/(65))`

x = 59.49°

≈ 60°

Therefore, option (3) will be the correct option.