Does any1 know how to do these?
The angle of elevation to the top of a building is found to be from the ground at a distance of feet from the base of the building. Find the height of the building.
A hot-air balloon is floating above a straight road. To calculate their height above the ground, the balloonists simultaneously measure the angle of depression to two consecutive mileposts on the road on the same side of the balloon. The angles of depression are found to be and .
How high (in feet) is the ballon?