Python Mountain Calc

import math

print('this program calculates the height of a mountain')

a1 = float(input("please enter your azimuth1 in feet: "))

a2 = float(input("please enter your azimuth2 in feet: "))

d = float(input("please enter your distance between azimuth 1 & 2: "))

h = d * math.tan(a1) * math.tan(a2) / (math.tan(a2) - math.tan(a1))

print(h)