Asked by stella
find the three cuberoots of 8( cos 264 + jsin 264) and state which is the principal cuberoot. Show all three roots on an argand diagram.
Answers
Answered by
Steve
∛rcisθ = ∛r cis θ/3
so, we have to find all the angles between 0 and 360:
2 cis 88
2 cis (88+120)
2 cis (88+240)
so, we have to find all the angles between 0 and 360:
2 cis 88
2 cis (88+120)
2 cis (88+240)
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