Tangents to a circle from a point, using Geometric Algebra
This resource is part of a series that I am preparing in support of Professor David Hestenes's goal of using Geometric Algebra(GA) to integrate high-school algebra,geometry, trigonometry,and physics into a coherent curriculum.
Previous materials in this series:
Dot Product: Geometric Significance and GeoGebra Coding (http://tube.geogebra.org/b/1022879#material/949399)
Inner and Outer Products of Vectors Inscribed in a Circle (http://tube.geogebra.org/b/1022879#material/1015919)
Geometric Algebra: Find unknown vector from two dot products (http://tube.geogebra.org/m/1481375)
GeoGebra coding/usage of Geometric Algebra's wedge product (http://tube.geogebra.org/m/1503117)
Resources prepared by Professor Hestenes and Robert Rowley:
http://geocalc.clas.asu.edu/GA_Primer/GA_Primer/
http://geocalc.clas.asu.edu/GA_Primer/GA_Primer/introduction-to-geometric/high-school-geometry-with/index.html
LinkedIn group for collaborative development of pre-university materials on GA:
Pre-University Geometric Algebra
https://www.linkedin.com/groups?home=&gid=8278281
Wiki for the same purpose:
http://preuniversitygeometricalgebra.wikispaces.com/