Convert to Rectangular Form...4

[nycmathguy]

Question 7

r = 2 cos θ

Multiply both sides by r.

r • r = 2 r cos θ

r^2 = 2x

x^2 + y^2 = 2x

x^2 + y^2 - 2x = 0

You say?

 

[MathLover1]

correct

 

[nycmathguy]

correct

Again


Again, why did you not solve for y in this example?