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Demonstrations 21 - 40 of 1107
Graphical Solution of a Quadratic Equation Using a Result from Optics
Difference of Cubes
Pisot, Salem and Cyclotomic Polynomials
Lissajous Figures from Projections of Points on Circles
Factoring the Even Trigonometric Polynomials of A269254
Doubly Recursive Integer Factorizations
Approximating Pi with Trigonometric-Polynomial Integrals
The Music of Mathematical Constants
Check Digit Schemes
Virtual Flash Cards
Basic Arithmetic in Other Bases
Wrapping the Number Line around the Unit Circle
The Maximum Rectangular Area under Different Curves
An Exploration of the "6174 Problem" and Some Generalizations
Area of a Triangle Using Sine
Solid and Dihedral Angles of a Tetrahedron
Directed Angles and Their Types
Measure of the Angle between Two Straight Lines
Multiple Angle Formulas for Sine and Cosine
Rule of Product Applied to Decks of Cards
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