Polar Form of Complex Number/Examples/3 cis -2 pi 3^-1/Mistake

Source Work

 * Chapter $1$: Complex Numbers
 * Supplementary Problems: Polar Form of Complex Numbers: $84 \ \text {(f)}$

Mistake

 * Graph each of the following and express in rectangular form.
 * ... $\text {(f)} \ \ 3 e^{-2 \pi i / 3}$


 * ''Ans. ... $\text {(f)} \ -3 \sqrt 3 / 2 - \paren {3 / 2} i$

Correction
The correct solution is:


 * $-\dfrac 3 2 - \dfrac {3 \sqrt 3} 2 i$