Wednesday, 27 January 2016

Represntation of a complex number in polar form

Question: enter image description here



The answer given in the textbook is option d.
What if I take iota outside the bracket which gives



(iota)^4 (cos theta + iota*sin theta)^4




1*(cos 4theta + iota*sin 4theta)



Which means option c.
What am I doing wrong?

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