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  • (cur | prev) 18:31, 19 September 2008‎ Chen18 (Talk)‎ . . (670 bytes) (+24)‎
  • (cur | prev) 18:24, 19 September 2008‎ Chen18 (Talk)‎ . . (646 bytes) (+646)‎ . . (New page: <math>\,cos(2t)</math> can be written as <math>\ {e^{-2jt} + e^{2jt} \over 2}</math> based on Euler's forumla: :<math>\cos x = \mathrm{Re}\{e^{ix}\} ={e^{ix} + e^{-ix} \over 2}</math> Sin...)
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Basic linear algebra uncovers and clarifies very important geometry and algebra.

Dr. Paul Garrett