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Mathematics 23 Online
OpenStudy (anonymous):

Prove or disprove that A X (A X(A X B) · C = -|A|^2A·B X C x = cross product · = dot product

OpenStudy (mathteacher1729):

Hey, if you haven't yet found it -- Michael Corral has an AWESOME free text on multivar calc. http://www.mecmath.net/ It has one of the best intros to dot and cross products I've ever seen. :) Check it out!

OpenStudy (anonymous):

Link doesn't work.

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