A. What is the angle of depression from the camera on the top of the skyscraper to the runner at 30 degrees?
B. If the angle of depression of the burglar changed from 30 degrees to 18 degrees from the camera, how far did the burglar run?
C. If the house the burglar entered in is 20 degree away, how tall is the house?
D. The camera on top of the skyscraper looked farther to make a 40 degrees because of the burglar's trick. What is the angle of depression of the camera to the new site now?