Hi all, will you please assist
z=2cis120º
Nice day all
Hello, nunuza!
Do you know the meaning of "cis"?
$\displaystyle 2\!\cdot\!\text{cis}(120^o) \;=\;2\left(\cos120^o + i\sin120^o\right) \;=\;2\left(-\frac{1}{2} + i\frac{\sqrt{3}}{2}\right) \;= \;-1+ i\sqrt{3}$Express in rectangular form: .$\displaystyle z \:=\:2\!\cdot\!\text{cis}(120^o)$