Edexcel IALMathematicsGeneral Applications4 Marks
A curve C has parametric equations x = 3cos(t) + 2, y = 4sin(t) - 1, for 0 ≤ t < 2π. (b) Hence, sketch the curve C, clearly indicating the coordinates of any points where the curve meets the coordinate axes.
- (b)Hence, sketch the curve C, clearly indicating the coordinates of any points where the curve meets the coordinate axes.[4]
Mark scheme
Marking points from the official mark scheme. The mark or mark type is shown in brackets.
- B1 for correctly identifying the shape as an ellipse.
- M1 for attempting to find the intercepts by setting x=0 or y=0.
- A1 for correct y-intercepts (y = -1 ± √12 or -1 ± 2√3) OR correct x-intercepts (x = 2 ± 9/4 or 2 ± 2.25). (Accept exact values or decimal approximations for these marks)
- A1 for a correct sketch with all intercepts (or major/minor axes endpoints) correctly labelled. The ellipse must be centered at (2, -1).
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