Identities - Look up the most common (and some not-so-common) trig identities. 4. Graph - Plot up to three trigonometric functions at the same time. • Enter your own custom functions! • Draw once or loop the graph continuously • Tap and hold on the graph to bring up a magnifying glass for precision • See the unit circle being drawn as functions are plotted Watch the video tour on our web site! We welcome your feedback. Please visit our web site or write us from within the app!