InverseSine01Drag the point, "C" along the sine function. Notice that C's reflection about the line y = x (point "D") traces out the inverse, which is not a function, since it clearly violates the vertical line test (as you'd expect, given the periodic nature of the sine function -- "It's NOT one-to-one!")
Dave Matthews, March 10, 2007, Created with GeoGebra |