a. Show that cos 3 sin can be written in the form R cos
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a. Show that cos θ − √3 sin θ can be written in the form R cos (θ − α), with R > 0 and 0 < α / π/2.
b. Hence sketch the graph of y = cos θ − √3 sin θ, 0 < α < 2π, giving the coordinates of points of intersection with the axes.
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Related Book For
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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