Polar to Cartesian coordinates..

**Jgirl689** · April 27th 2010, 03:34 PM

Convert the following equation given in polar coordinates to Cartesian (x,y) coordinates

where

y = ??

Have no idea how to start this..with polar coordinates..can someone help?

**Prove It** · April 27th 2010, 03:45 PM

Originally Posted by Jgirl689

Convert the following equation given in polar coordinates to Cartesian (x,y) coordinates

where

y = ??

Have no idea how to start this..with polar coordinates..can someone help?

You're expected to know that

$x = r\cos{\theta}, y = r\sin{\theta}$ and $r^2 = x^2 + y^2$ .

How do you think you can rearrange this formula so that it is in terms of $r, \sin{\theta}$ and $\cos{\theta}$ ?

**Jgirl689** · April 28th 2010, 08:25 PM

I solved it and for the answer I got y=x^2...is that right?

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