Trigonometric Modeling And Transformation

The document discusses trigonometric modeling of the moon's phases. It notes that on September 17, 2005 the moon was 100% visible and provides the trigonometric equations to model the moon's light based on the date. It then uses the equations to determine that on September 15, 2005 the moon was visible at 95.7% and that 65% visibility would occur around September 29th.