4 cis 60°3 is equal to
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(4cis60°)³= (4cos60° + 4isin60°)³
= (e^(4i60°))³
=(e^i4π/3)³
=e^i4π
= cos4π+isin4π
=1
Jerusha2002:
for the question there no option with answer 1
answers are in complex
please check your options
as much I know, I've provided the correct answer
ur answer is wrong
tell if there's any error in the solution, answer may be wrong in your booklet
it's not wrong... ur answer may be right.. but this is not the answer i expect...
sorry, then I can't help it
mm
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