Question

Please i will give you 23 points\

Answer 1

x ≈ 45.6°

Explanation:

using the Cosine rule in the triangle

cos x =
`(8^2+15^2-11^2)/(2(8)(15))` =
`(64+225-121)/(240)` =
`(168)/(240)` , then

x =
`cos^(-1)` (
`(168)/(240)` ) ≈ 45.6° ( to 1 dec. place )