A curve is defined by the parametric equations
x=2cosθx = 2\cos\thetax=2cosθ, y=2sinθy = 2\sin\thetay=2sinθ, where 0≤θ≤2π 0 \leq \theta \leq 2\pi\,0≤θ≤2π
One of the equations below is a Cartesian equation for this curve.
Identify this equation.
Select the correct answer.
yx=tanθ\frac{y}{x} = \tan\thetaxy=tanθ
x2+y2=4x^2 + y^2 = 4x2+y2=4
x2−y2=4x^2 - y^2 = 4x2−y2=4
x2+y2=2x^2 + y^2 = 2x2+y2=2
143 exam-style questions on OCR A Level Maths 1.3 Coordinate Geometry in the x-y Plane, covering 1.3.1 Straight lines, 1.3.2 Parallel and perpendicular lines, 1.3.3 Straight line models, 1.3.4 Coordinate geometry of a circle, 1.3.5 Centre and radius by completing the square, 1.3.6 Circle properties, 1.3.7 Parametric equations of curves (A-level only), 1.3.8 Parametric equations in context (A-level only), and 1.3 Coordinate Geometry in the x-y Plane. Each one has a worked solution and a mark scheme showing where the marks go.