Answer:
Y = 59.0°
Step-by-step explanation:
Using the cosine rule in terms of x, y and z
cosY =
with x = 22, y = 20 and z = 18
=
= , thus
Y = ( ) ≈ 59.0° ( to the nearest tenth )
Answer: 4236
Step-by-step explanation: I used a calculator. If it's wrong, tell your teacher/instructor.
The answer should be D.