## aussy123 one year ago How to convert polar to cartesian and cartesian to polar.

1. diongory

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2. diongory

for polar to cartesian think about writing r in terms of x and y, and theta in terms of x and y

3. aussy123

I think what you wrote at the top is polar to cartesian. Because your finding x and y. I really need to know how to find cartesian to polar.

4. diongory

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5. aussy123

I think so Im given something like that with this tan^-1

6. diongory

i know what the answer is. I'm trying to help you get there yourself. Work out those two equations i drew for you.

7. aussy123

$\sqrt{x^2+y^2}=r$

8. diongory

excellent!

9. aussy123

$x+y=r$

10. diongory

no. not so good.|dw:1366123658835:dw|

11. diongory

12. diongory

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13. aussy123

oh sorry

14. diongory

15. aussy123

would it be $\frac{ \sqrt{x} }{ \sqrt{y} }$

16. diongory

how did you get that?

17. aussy123

theta = tan^-1 (y/x)

18. diongory

great. well done. that is it. you have finished.

19. aussy123

thank you

20. diongory

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