- #1
thomas49th
- 655
- 0
Homework Statement
Find the polar form of 2i − 1
Finding polar form is easy r(cosx + isinx)
call the real part a and imaginary part b
r = sqrt(a+b)
theta = arctan (-2) = - 63.43
This is the wrong angle for theta as it's 116.57 (which is 180 - 64.43), and I guess this if form that quadrant thing
S | A
___|___
|
T | C
okay not the best grid, but can anyone refresh my memory as how to get the correct value of theta?
Thanks :)