Answer:
D
Step-by-step explanation:
To convert from polar to rectangular form
• x = rcosΘ , y = rsinΘ
• r = [tex]\sqrt{x^2+y^2}[/tex] ⇒ r² = x² + y²
Given
r = 8cosΘ
r = 8 × [tex]\frac{x}{r}[/tex] ( multiply both sides by r )
r² = 8x, hence
x² + y² = 8x ⇒ D
