Pre-Calculus Index
and links to historical sketches


    JAVA Applet for Trig Functions:  Interactive, Quiz and Feedback
    Sine and Cosine Functions
    Applet for the Unit Circle - Interactive with Feedback
    Unit Circle
    JAVA Applet Interactive Trig Functions

Polar Graphs
    Maplesoft@ Code and Animations
    Curves and Code in POVRAY

Parametric Equation Graphs

    Maplesoft@ Code and Animations
    MATHEMATICA@ Code and Animations
                               [Please see the Index of Curves for a more complete list.]


    Spiral of  Jakob (James) Bernoulli

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

Uploaded March 20. 2004