convert the rectangular to a polar equation:

-8x-3y+5=0

i know that x= r cos theta, as well as other identities

convert the polar to a rectangular equation:

r= 2/ (4-5 cos theta)

i don't even know where to begin here!

thanks

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- Apr 6th 2009, 05:07 PMss103rectangular to polar equation
convert the rectangular to a polar equation:

-8x-3y+5=0

i know that x= r cos theta, as well as other identities

convert the polar to a rectangular equation:

r= 2/ (4-5 cos theta)

i don't even know where to begin here!

thanks - Apr 6th 2009, 05:14 PMmr fantastic
- Apr 6th 2009, 05:18 PMss103
thanks!

but for the first one, i tried to solve it but i dont know how:

-8r cos theta - 3r sin theta +5 =0

where do i go now? do i square it? - Apr 6th 2009, 05:30 PMmr fantastic