Question

Which polar coordinates represent the same point as (4,-pi/2)?..select all that apply

a.(-4,-3pi/2)
b.(-4,pi/2)
c.(4,5pi/2)
d.(4,-9pi/2)
e.(-4,-pi/2)
f.(4,3pi/2)

Answer 1

first one ends up in the same spot

Answer 2

so does the second one

Answer 3

not the third one because it is here

Answer 4

4th one is good, count \(\frac{9\pi}{2}\) going clockwise and you see you end up in the same spot

Answer 5

is that all?

Answer 6

that combination was wrong:( i only have one more chance to get it right

Answer 7

I get all except c and e

Answer 8

thank you!