Pre-Calculus Index and links to historical sketches

 Trigonometry     JAVA Applet for Trig Functions:  Interactive, Quiz and Feedback http://curvebank.calstatela.edu/javatrig2/javatrig2.htm     Sine and Cosine Functions  http://curvebank.calstatela.edu/sine/sine.htm     Applet for the Unit Circle - Interactive with Feedback http://curvebank.calstatela.edu/trig/trig.htm     Unit Circle http://curvebank.calstatela.edu/unit/unit.htm     JAVA Applet Interactive Trig Functions http:http://curvebank.calstatela.edu/cs390trig/cs390trig.htm Polar Graphs     Maplesoft@ Code and Animations http://curvebank.calstatela.edu/polar/polar.htm     Curves and Code in POVRAY http://curvebank.calstatela.edu/povray/povray.htm Parametric Equation Graphs     Maplesoft@ Code and Animations http://http://curvebank.calstatela.edu/cycloidmaple/cycloid.htm     MATHEMATICA@ Code and Animations http://curvebank.calstatela.edu/lissajous/lissajous.htm                                [Please see the Index of Curves for a more complete list.] Logarithms     Spiral of  Jakob (James) Bernoulli http://curvebank.calstatela.edu/log/log.htm Geometry:  The Circle, Pythagorean Theorem, and Distance Formula     Estimating Distances on a Map     Animated Derivation of the Area of a Circle and the Pythagorean Theorem
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The background image is that of René Descartes (1596 - 1650).  He was born 46 years before Newton and 50 years before Leibniz.  Please see his Folium and the historical sketch in Equiangular Spiral