The curve C has parametric equations x = sin t, y = cos 2t + 1, 0

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The curve C has parametric equations x = sin t, y = cos 2t + 1, 0 < t < 2π. Given that the line y = k, where k is a constant, intersects the curve, 

a. Show that 0 < k < 2 

b. Show that if the line y = k is a tangent to the curve, then k = 2.

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Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

ISBN: 9781292183404

1st Edition

Authors: Greg Attwood, Jack Barraclough, Ian Bettison, David Goldberg, Alistair Macpherson, Joe Petran

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