$\sqrt{z}=\sqrt{81(\text{cos}(\frac{4\pi}{9})+i\text{sin}(\frac{4\pi}{9})}\\=9\text{cos}\frac{1}{2}(2k\pi+(\frac{4\pi}{9}))+i\text{sin}\frac{1}{2} (2k\pi+(\frac{4\pi}{9}))$

Keep in mind that this is solved for k = 0 and 1.

Second, simplify.

$=9\text{cos}(\frac{2\pi}{9})+i\text{sin}(\frac{2\pi}{9})~\text{or}~9\text{cos}(\frac{11\pi}{9})+i\text{sin}(\frac{11\pi}{9})$

Best of Luck!

6 0

3 years ago

Trina said $1.05+$2.25 =$3.75 because a dollar and 2 quarters plus 2 dollars and a quarter equals 3 dollars and 3 quarters. Do y

tatuchka [14]

Answer:it is approximately 4 dollars and 6 cents

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

What is the slope of the line in the xy plane that passes through the points (-5/2, 1) and (-1/2, 4)?

zaharov [31]

I hope this helps you

5 0

3 years ago