Polar form of complex numbers
Which is shown in the graph?

2(cos(-45)+i sin(-45))
or
-2(cos(135)+i sin(135))

Question

Polar form of complex numbers
Which is shown in the graph?

2(cos(-45)+i sin(-45))
or
-2(cos(135)+i sin(135))

anonymous · Answer

I don't get it...don't they equal each other? So how do I know which is the correct one?

experimentx · Answer

$ r (\cos \theta + i \sin \theta)$

move in the angle $ \theta $, if r is negative ... plot in opposite direction

-2(cos(135)+i sin(135)) must be 
|dw:1337059573907:dw|

2(cos(-45)+i sin(-45)) must be
|dw:1337059687259:dw|

It seems both are equialent