Who uses trigonometry?
This question has been used by many students when they are trying to argue to their parents that their math class "isn't important". "Who uses this stuff anyway?" they might say and in fact, there are many instances of Trigonometry use throughout the world. One use of trig is in the military. With planes dropping bombs or with artillery shooting down planes, there are equations. If you could freeze frame an action scene in a war battle, you could draw a triangle connecting the plane to the ground and then to the artillery equipment. When artillery and airplanes with bombs were first used in the military, they pilots of the equipment would have to do all of the calculations in the air and in the heat of battle. They would use trigonometry to find the angle of depression and to calculate the distance so that when they drop the bomb, it would hit right on target. Now, since technology has been upgraded so much, the machine does all of those calculations on the spot and it takes no more than a split second. But the military is full of jobs that use trig to calculate direction and distance.