Can someone please check my work. My instructor said to leave in cis format. Find the 4th roots of 1+i 2^1/8cis(11.25) 2^1/8cis(25.3) 2^1/8cis(47.81) 2^1/8cis(70.31) I feel like I'm on the right track... Thanks for any help.
Follow Math Help Forum on Facebook and Google+
Originally Posted by repete Can someone please check my work. My instructor said to leave in cis format. Find the 4th roots of 1+i 2^1/8cis(11.25) 2^1/8cis(25.3) 2^1/8cis(47.81) 2^1/8cis(70.31) I feel like I'm on the right track. The numbers in red are wrong. It would be better to use nunbers or degrees.
Ahh ok. It was an arithmetic error. Is this correct? 2^1/8cis(11.25) 2^1/8cis(101.25) 2^1/8cis(191.25) 2^1/8cis(281.25) Thanks that makes more sense.
Originally Posted by repete Ahh ok. It was an arithmetic error. Is this correct? 2^1/8cis(11.25) 2^1/8cis(101.25) 2^1/8cis(191.25) 2^1/8cis(281.25) Thanks that makes more sense. That of course is in degree form. That may be how your instructor wants the answer. Here is the number form: $\displaystyle \frac{\pi}{16},~\frac{9\pi }{16},~\frac{-7\pi }{16},~\&~\frac{-15\pi }{16}$
Thanks, I appreciate the help.
View Tag Cloud