From a hot air balloon, the angle between a radio antenna straight below and the base of the library downtown is #57°#, as shown below. If the distance between the radio antenna and the library is #1.3 mls#, how many miles high is the balloon?
We could use trigonometry, although I am not sure you know about it...!
Anyway, using trigonometry we have that the height of the baloon
We can use a scientific calculator to find that:
so we get: