Here is main way to find the sum of geometric series and how to find them in step-by-step #GeometricProgression #Geometric #Calculus #Algebra

Full question: A boat is heading towards a lighthouse, whose beacon-light is feet above the water. From point A, the boat’s crew measures the angle of elevation to the beacon, , before they draw closer. They measure the angle of elevation a second time from point B at some later time to be . Find the distance from point A to point B . Round your answer to the nearest foot if necessary.