Mathematics (AS & A Level) · Oct / Nov 2020 · Paper 11 · Question 4
9709
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1 y −1 1 2 3 4 5 π 2π 3π 4π 0 y = cos 1 In the diagram, the lower curve has equation y = cos 1. The upper curve shows the result of applying a combination of transformations to y = cos 1. Find, in terms of a cosine function, the equation of the upper curve. [3]
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