# complex numbers

115 cis 45*
3 solutions = 120* apart

Are these correct?
115 cis 45*
115 cis 45 + 120 = 165*
115 cis (45 + 120 + 120) = 285*??

WHat is cis?

cos + isin

1. 0
2. 0

## Similar Questions

1. ### complex number ~

thanks BOB =) *HUGS* 115 cis 45* 3 solutions = 120* apart Are these correct? 115 cis 45* 115 cis 45 + 120 = 165* or is it (-75*) 115 cis (45 + 120 + 120) = 285*?? or (-195*)?? It's really Matthew!I found out what it is but I will
2. ### Math

Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6
3. ### Pre-Calc

Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6
4. ### CIS 115

CIS 115 week 7 exercise: Determine output. I need help with this week's exercise...DeVry CIS 115 week 7...please help! Using the questions on page 2, determine the output for each question. If input data is provided, be sure to
5. ### equation complex number

z^4 + 81 = 0 (solve) change it to polar, then take the root. z^4= 81@180 z= 3@180/4 + n90 where n=0, 1, 2, 3 check: z= 3@180/4 + 3*90=3@315 z^4=81@(4*315)=81@1260= 91@180=-81 you can check it at the other roots also. this is what
6. ### Precal

The number cis 75 + cis 83 + cis91 +...+ cis 147 is expressed in the form r cis(theta), where 0
7. ### Pre-cal

The number cis 75 + cis 83 + cis91 +...+ cis 147 is expressed in the form r cis(theta), where 0
8. ### Trigonometry

QUESTIONS IM STUCK ON 6. Change -4√2 - 4√2 to trigonometric form A. 32 cis 135° B. 8 cis 225° C. 8 cis 45° D. 32 cis 45° 7. Simplify (2 cis 100°)7. A. 2 cis 700° B. 128 cis 280° C. 128 cis 340° D. 2 cis 340° 9.
9. ### Trigonometry

im stuck on these questions....... 6. Change -4√2 - 4√2 to trigonometric form A. 32 cis 135° B. 8 cis 225° C. 8 cis 45° D. 32 cis 45° 7. Simplify (2 cis 100°)7. A. 2 cis 700° B. 128 cis 280° C. 128 cis 340° D. 2 cis
10. ### Calc

1. The problem statement, all variables and given/known data cos(x) = -2 I was trying to solve that problem ignoring what people say about it not being defined and got a number strangely. I showed step by step so you can tell me

More Similar Questions