Trigonometric Identities--A Clever Way to Prove

Things you can't learn from other places.
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"...Your web site is interesting, and you have provided some nice examples and problems..."

--Dr. Askey
  From University of Wisconsin Madison

"...It seems well written and certainly has some interest as a tutorial on how to tackle the verification of trigonometric identities...The final version (of the web site) looks just super. Congratulations!..."

--Dr. Bona
  From University of Texas at Austin

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