Question

Can you please help me ?

Answer 1

What you can do for this case is to use the following trigonometric definition.
 Tan (x) = a / b
 Where,
 a: opposite side of the triangle.
 h: adjacent side of the triangle.
 Clearing x:
 x = Atan (a / b)
 Substituting:
 x = Atan (a / b)
 x = Atan (5.74 / 4)
 x = 55.12874356
 Whole degree
 x = 55
 Answer:
 x = 55 (option 3)