For this case what you should know is that you should model the problem as a triangle with a right angle.
We then have the following trigonometric relationship:
Tan (30) = y / 200
Clearing the value of and we have:
y = 200 * tan (30)
y = 115.4700538
Nearest foot:
y = 116 feet.
Answer:
the helicopter is 116 feet above the ground