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Recent content by ranganerd

  1. R

    Expanding cubic brackets

    not that i know of, just crunch the numbers
  2. R

    would we be penalised for...???

    rcis(θ) is an acceptable way of showing complex numbers r(cosθ +isinθ) is just to allow us to convert back to a+ib you do need to write in terms of -π<x<π i.e. you need to write -cis(π/3) working out is always important always use radians
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