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Location of proofs of trigonometric identities

  1. Dec 27, 2011 #1
    Where would be the best place to find every trigonometric identity, from sin[2] + cos[2] = 1, to the matrix identities (and Euler's equation would be helpful, also)

    Also the location of mathematical analysis symbols would be helpful, also. Thank you very much in advance :)
  2. jcsd
  3. Dec 28, 2011 #2


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    Have you tried Google?
  4. Dec 28, 2011 #3
    LOL. And for the poster who asked—you could try Wikipedia. I've heard that it has quite a bit of formulas as well as their proofs.

    …or you could always by a Trigonometry (Trigonometry only!) textbook online. I'll bet there's a decent one that covers everything from the basics to advanced concepts.
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