Answer:
part 1 : 45
part 2: a
Step-by-step explanation:
part a is quite clear as it says the elevation is 15 deg more than 30 deg
part b:
distance between the tower and man = base = 40
angle of elevation = 45
hypotenuse = distance between the worker’s eyes and the original top of the tower
using pythagoras theorem,
hcos45 = 40
h= [tex]\frac{40}{cos45}[/tex]