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3.3 Coordinate geometry in the (x, y) plane (A-level only)

3.3 Coordinate geometry in the (x, y) plane (A-level only)

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Question 21

A curve has the parametric equations

x=3sin⁡2θ,y=2cos⁡θ,0<θ<π x = 3\sin^2 \theta, \quad y = 2\cos \theta, \quad 0 < \theta < \pi x=3sin2θ,y=2cosθ,0<θ<π
a.

Find an expression for dydx\displaystyle \frac{dy}{dx}dxdy​ in terms of θ\thetaθ.

[3]
b.

Find an equation of the normal to the curve when θ=π3\displaystyle \theta = \frac{\pi}{3}θ=3π​.

[5]
c.

Find a cartesian equation for the curve.

[4]
Markscheme

3.3 Coordinate geometry in the (x, y) plane (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.3 Coordinate geometry in the (x, y) plane (A-level only)

76 exam-style questions on WJEC A Level Maths 3.3 Coordinate geometry in the (x, y) plane (A-level only), covering 3.3.1 Coordinate geometry in the (x, y) plane (A-level only) and 3.3.2 Coordinate geometry in the (x, y) plane (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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