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Precalculus: A Right Triangle Approach (2nd Edition) Автор: J. S. Ratti, Marcus S. McWaters Год: 2010 |
The master book of mathematical recreations Автор: Fred Schuh Год: 1968 |
103 Trigonometry Problems: From the Training of the USA IMO Team Автор: Titu Andreescu Год: 2004 |
Green Start Wooden Puzzles: Busy Butterfly - Earth Friendly Puzzles with Handy Carry&Storage Case Автор: Ikids Ikids Год: 2010 |
Green Start Giant Floor Puzzles: ABC Animals (36 Piece Floor Puzzles Made of 98% Recycled Materials) Автор: Ikids Ikids Год: 2010 |