Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#1 2016-03-31 20:20:04

Registered: 2010-06-20
Posts: 10,149


I seem to have overloaded the servers maximum number of links so I'm continuing the list here.

tan(36) … 87#p378587

The Regular Icosahedron

Note: I was having difficulty making my answer match the one given by Monox D. I-Fly.  I have worked out the two versions are the same but I cannot get the final proof to post; why I don't know.  So I'll try again later

Base Vectors and Coordinates.  A beginning. … 53#p387953

A matrix for rotation and the compound angle formulas … 28#p389628


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob smile


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