The picture below shows a right-triangle-shaped charging stand for a gaming system: The side face of a charging stand is a right triangle labeled ABC. The measure of angle ACB is 90 degrees, and the measure of angle ABC is 55 degrees. The height of the stand is 7 inches. Which expression shows the length, BC, of the base of the stand? 7 over tan 55 degrees 7(cos 55°) 7 over sin 55 degrees 7(tan 55°)