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Trig Question

  1. Jan 12, 2012 #1
  2. jcsd
  3. Jan 12, 2012 #2


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    I would have put a ##\pm## sign on it. But one might also make the argument that the inverse function is understood to mean the principal value branch. In that case the principal value branch is usually chosen to have positive slope. Your mileage may vary.
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