I have this problem and I want to make sure I understand it.

Use DeMoivre's theorem to write [3cis(pi/2)][squared] in the form a + biwithout trigonometric functions.

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- Jan 14th 2007, 10:25 PMmike1DeMoivre's theorem
I have this problem and I want to make sure I understand it.

Use DeMoivre's theorem to write [3cis(pi/2)][squared] in the form a + b*i*without trigonometric functions. - Jan 15th 2007, 04:52 AMSoroban
Hello, Mike!

Quote:

Use DeMoivre's theorem to write in the form

We don't really need DeMoivre's Theorem for this one, but here goes . . .

We have: .

. . . . . .

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

We could have squared it without DeMoivre's Theorem.

. . Then: .