Monthly Archive: June 2012

Trig Identities and more…

Trig Identities

Here is a great reference sheet for all that Trig ‘Stuff’!  It is color coded to help separate the various identities. The back has a table of each trig functions solved in terms of the others, the unit circle, geometric construction of each trig function as well as a table of values of common angles. …

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Paper Folding Conic Sections

foldingConics

Great activities that illustrate the definition of each conic section where each fold represents one of the ‘trace lines’ in similar Geometer’s Sketchpad Activities. Paper Folding a Circle,  Ellipse,  Hyperbola,  Parabola Why does this work? For a great article proving why these work along with derivations of equations see:  Paper Folding and Conic Sections, Mathematics …

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