Question

Write (2 - 7i) in polar coordinates on the complex plane. (help)

Answer 1

2 - 7i
x=2 and y=-7
r = √x^2+y^2
r = √(2^2 + (-7)^2) = √53
Tan ø=x/y
Tan ø = 2/-7 = -2/7
arctan -2/7 = -74.05460409907715º

ø = -74.05º

Answer 2

Welcome to Openstudy.

Answer 3

a+bi=r[cos(theta)+isin(theta)]
do i have to put it in this form? ^

Answer 4

http://mathworld.wolfram.com/PolarCoordinates.html

Answer 5

Oh the Answer is (root(53), -74.05)

Answer 6

Thank you:)

Answer 7

My Pleasure.