Question

Convert z=6cis(π) to rectangular form

Answer 1

What does \(cis(\pi)\) mean? Expand that to its full expression.

Answer 2

I don't know its just one of the problems i have to do for an online class

Answer 3

Since \(\large \mathrm{cis}(\theta) = \cos\theta+i\sin\theta\), we have that \(\large 6\mathrm{cis}(\pi) =6(\cos\pi + i\sin \pi) = \ldots\)

Can you take things from here? :-)

Answer 4

I think so

Answer 5

z=-6 Thanx! @ChristopherToni

Answer 6

That's correct. I hope that clarifies things!