Edexcel A-Level - June 2019 - Pure Mathematics Paper 2 - Question 4 - Exam Paper Walkthrough

Full walkthrough answer for Edexcel A-Level maths Summer 2019 Pure maths paper 2, question 4.
The curve C1 with parametric equations
x=10cos t , y = 4 _/2sin t,
meets the circle C2 with equation
x^2 + y^2 = 66
at four distinct points as shown in Figure 2.
Given that one of these points, S, lies in the 4th quadrant, find the Cartesian coordinates of S.
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