Which of the following is the Cartesian equation for the polar equation r cos θ = 5?

Question

Which of the following is the Cartesian equation for the polar equation r cos θ = 5? (5 points)

answer choices

	y = 5
	x = 5
	x + y = 5
	x - y = 5

Answer 1

cos θ = y / r

r cos θ = y

r (y / r) = 5

y = 5