A curve C C\,C has the parametric equations
x=4sectx = 4\sec tx=4sect, y=7tanty = 7\tan ty=7tant, where 0≤t<π2\displaystyle 0 \leq t < \frac{\pi}{2}0≤t<2π
Show that a Cartesian equation for C C\,C is
49x2−16y2=78449x^2 - 16y^2 = 78449x2−16y2=784
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.