For this case we can use the following trigonometric relationship:
tan (theta) = y / x
Substituting values we have:
tan (theta) = (4/5) / (3/5)
Rewriting we have:
tan (theta) = 4/3
Clearing theta:
theta = Atan (4/3)
theta = 53.13 degrees
Answer:
the approximate value of teta is:
theta = 53.13 degrees