If you guys didn't know, I have my quiz tomorrow and I have one last thing to ask to this Community! I am completely confused on how to convert polar coordinates to regular coordinates. The teacher gave us this example:
Convert to Polar Coordinates: $(3 , -45^\circ)$
$x = r\cos(\theta) = 2\cos(-45^\circ) = 3(\frac{\sqrt{2}}{2})$
$y = r\cos(\theta) = 3\sin(-45 ^\circ) = 3(\frac{-\sqrt{2}}{2})$
$(\frac{3\sqrt{2}}{2} , \frac{-3\sqrt{2}}{2})$
Ok, she did that and gave us this (one of of the two) for a review:
$(6 , \frac{-2\pi}{3})$
Well then I had completely no idea..(I know the equation though)
I did this:
$x = r\cos(\theta)$ $x = r\sin(\theta)$
I basically didn't know what to put at the coefficient of $\cos$ and $\sin$. please help. Thanks a lot for reading!