Convert from Rectangular to Polar Form

Question

Convert the following from Rectangular to Polar Form:

 

2x-9y+3=0

Answer 1

In converting from rectangular to polar coordinates,

 

x = r cos θ

y = r sin θ

 

Therefore, you can just substitute.

 

2x - 9y + 3 = 0 becomes

2r cos θ - 9r sin θ + 3 = 0