Answer: 56.3°
Step-by-step explanation:
You need to use a trig ratio, more specifically, tangent.
Use SOHCAHTOA
Tangent = Opposite / Adjacent
tan x = [tex]\frac{4.2}{2.8}[/tex]
4.2/2.8 simplifies to 3/2
Use inverse tan function.
x = [tex]tan^{-1}[/tex] ( 3/2)
Use a calculator to find value of x
x ≈ 56.3°
