Question

find the polar form of i^7+i^10

Answer 1

first simplify i^7 and i^10 ?

Answer 2

that would be z=-1-i...rite?

Answer 3

yes!

Answer 4

know how to get polar form ?

Answer 5

i m just confused at d part where u hv 2 find thita

Answer 6

theta = tan inverse y/x

Answer 7

theta = tan inverse (-1/-1)

Answer 8

z=r(\[\cos \theta + i\])

Answer 9

ooppss

Answer 10

z= r cos theta+ i r sin theta

Answer 11

i mean z=r(cos theta+i sin theta)

Answer 12

r =... ?

Answer 13

so i get tan inverse 1 so i m gettin theta as pi/4 but d ans says its 3pi/4

Answer 14

r i got as root 2

Answer 15

yes, and i'll tell u the reason
you tell me your r is positive or negative ?

Answer 16

positive

Answer 17

-1-i = -(1+i)

Answer 18

so, - root 2 angle 45

Answer 19

yep

Answer 20

but r cannot be negative

so, +root 2 angle (45-180)

Answer 21

hold on...45-180 kyu kiya?

Answer 22

it cannot b negative so? -180?