Question

if z=2cos 60degree, find Z^4 in retangular form.

Answer 1

@Hero , do you ind explaining with a formula?

Answer 2

So an easy way to do this is to just calculate 2cos60, and then multiply itself by that four times.

So like,
\[1^4 = 1 \times 1 \times 1 \times 1\]

Answer 3

That's what I thought too. ^

Answer 4

Which is 1, times z^4 would be 1.

Answer 5

Well, 1 was an example to show you what you would be doing. Z would be the result of 2cos60

Answer 6

I can show options.

Answer 7

Okay here, first off, what is 2cos60?

Answer 8

It's 1.

Answer 9

Oh, ew. Okay, so that's what it's asking

Answer 10

Are you sure that's supposed to say cis not cos?

Answer 11

It's cos.

Answer 12

Which is still equal to 1.

Answer 13

Right, yeah, I know. I honestly don't know how to do this with i numbers

Answer 14

Thank you for trying.

Answer 15

Sorry I couldn't be of more help

Answer 16

I'll see if someone else can help.