Question

Find y to the nearest tenth.

2.7
2.9
7.5

Answer 1

y = 8 x cos(20)

y = 7.517

y = 7.5

Answer 2

Using sohcahtoa; you have an angle and the hypotenuse. The side you are trying to find is adjacent to the angle therefore you use cos.
Cos(angle)=adjacent side/hypotenuse
Plug in to get cos(20)=y/8
Solve for y to get
Y=8*cos(20)
Solve for y
Y=7.51
Round to the nearest tenth
Y=7.5