The Letters R and θ Represent Polar Coordinates $$r = \cos \theta$$

question 145

Multiple Choice

The letters r and θ represent polar coordinates. Write the equation using rectangular coordinates (x, y) .
- $$r = \cos \theta$$

• A) \(x ^ { 2 } + y ^ { 2 } = x\)
• B) \(x ^ { 2 } + y ^ { 2 } = y\)
• C) \(( x + y ) ^ { 2 } = y\)
• D) \(( x + y ) ^ { 2 } = x\)