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Homework Help: Laurent Expansion sin z/(z-1)

  1. Jun 20, 2012 #1
    1. The problem statement, all variables and given/known data

    I'm supposed to find the Laurent expansion of sin z/(z-1) at z=1.

    3. The attempt at a solution

    I thought about expanding the sine as a power series of (z-1) but I'm not so sure if that would be correct since the sine is a function of z and not z-1.
  2. jcsd
  3. Jun 20, 2012 #2
    put z=1+h,
    then sin(1+h)/h.now you can expand it
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