Trigonometry
by Israel M. Gel'fand · first published 2001
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Trigonometry, a work in the collection of the Gelfand School Program, is the result of a collaboration between two experienced pre-college teachers, one of whom, I.M. Gelfand, is considered to be among our most distinguished living mathematicians. His impact on generations of young people, some now mathematicians of renown, continues to be remarkable. Trigonometry covers all the basics of the subject through beautiful illustrations and examples. The definitions of the trigonometric functions are geometrically motivated. Geometric relationships are rewritten in trigonometric form and extended.
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…http://www.amazon.com/Algebra-Israel-M-Gelfand/dp/0817636773 http://www.amazon.com/Method-Coordinates-I-M-Gelfand/dp/0817... http://www.amazon.com/Functions-Graphs-Dover-Books-Mathemati... http://www.amazon.com/Trigonometry-I-M-Gelfand/dp/0817639144... appropriately supplemented by ALEKS http://www.aleks.com and EPGY http://epgy.stanford.edu/district/info.html
on “Misconceptions about the Khan Academy” ↗…http://www.amazon.com/Algebra-Israel-M-Gelfand/dp/0817636773 http://www.amazon.com/Method-Coordinates-Dover-Books-Mathema... http://www.amazon.com/Functions-Graphs-Dover-Books-Mathemati... http://www.amazon.com/Trigonometry-I-M-Gelfand/dp/0817639144... appropriately supplemented by ALEKS http://www.aleks.com and EPGY http://epgy.stanford.edu/district/info.html ALEKS http://www.aleks.com/ is a commerical online site…
on “Math anxiety causes trouble for students as early as first grade” ↗…http://www.amazon.com/Algebra-I-M-Gelfand/dp/0817636773 http://www.amazon.com/Functions-Graphs-Dover-Books-Mathemati... http://www.amazon.com/Method-Coordinates-I-M-Gelfand/dp/0817... http://www.amazon.com/Trigonometry-I-M-Gelfand/dp/0817639144... http://www.amazon.com/Sequences-Combinations-Limits-Library-... and Basic Mathematics by Serge Lang http://www.amazon.com/Basic-Mathematics-Serge-Lang/dp/038796... and…
on “A Textbook Example of What’s Wrong with Education” ↗…http://www.amazon.com/Algebra-Israel-M-Gelfand/dp/0817636773 http://www.amazon.com/Functions-Graphs-Dover-Books-Mathemati... http://www.amazon.com/Method-Coordinates-I-M-Gelfand/dp/0817... http://www.amazon.com/Trigonometry-I-M-Gelfand/dp/0817639144... Gelfand poses delightful problems that give students a workout in arithmetic (and CAN'T be done with a calculator) and that build conceptual understanding and interest in…
on “The mathematics generation gap” ↗> Gelfand's wonderful basic math texts instead This is good stuff. Thanks for the pointer. http://www.amazon.com/Algebra-Israel-M-Gelfand/dp/0817636773 http://www.amazon.com/Trigonometry-Gelfand-Mathematical-Semi... > I haven't seen the physics sections You should take a look ;) Check out the "Free tutorial" in particular. It is just 7 pages and you can print.
on “No bullshit guide to math and physics” ↗…find some on Amazon. Gelfand's Algebra: https://www.amazon.com/Algebra-Israel-M-Gelfand/dp/081763677... Gelfand's Geometry: https://www.amazon.com/Geometry-Israel-M-Gelfand/dp/10716029... Gelfand's Trigonometry: https://www.amazon.com/Trigonometry-Gelfand-Mathematical-Sem...
on “American parents are sending their kids to 'Russian math' (2017)” ↗