CSERD, Shodor Found. - Interactive applet allows the user to change the parameters of waves and see how the measurements of that wave change.
Google - Research database allows searching of the scholarly literature.
IES - An applet that calculates the sine value of any angle and provides a graphical representation of its occurence on the unit circle.
University of Vienna - gallery of mathematical Java applets.
An alphabetical glossary of relevant scientific terms.
Picture and information of the sole surviving work of Hipparchus.
S. Waner, Hofstra U. - see an animation of the graphing of the sine wave by moving a point around the circumference of a circle.
E. Zobel, Zona Land - Interactive applet allows you to adjust the amplitude, wavelength and shift of a wave and see how it responds.