Question

Help plsssss with this tyy​

Answer 1

x = 60°

Explanation:

using the cosine ratio in the right triangle

cos x =
`(adjacent)/(hypotenuse)` =
`(9)/(18)` =
`(1)/(2)` , then

x =
`cos^(-1)` (
`(1)/(2)` ) = 60°