How do you convert a rectangular coordinate to a polar coordinate when x=0?

Question

unklerhaukus · Answer

well theta will be zero right?
and r will be y

anonymous · Answer

What was confusing me is that to find thetha you do Arctan(y/x), but when x=0 that is undefined

unklerhaukus · Answer

fair enough, that definition fails for x=0,

unklerhaukus · Answer

maybe you should have a tiny look at this wikipedia page for atan2 if you want to 'compute' the angle every time, http://en.wikipedia.org/wiki/Atan2 {... the section with atan2(y,x) = {... {...

unklerhaukus · Answer

it might be more intuitive to draw a picture

anonymous · Answer

thank you!

unklerhaukus · Answer

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anonymous · Answer

so it just ends up being r=1.5 theta=0?
(1.5,0)

anonymous · Answer

sorry, I realized I didn't actually put the question
the rectangular coordinate was (0,1.5)

unklerhaukus · Answer

ops, i meant to say theta will be 90° for when x=0

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