a. Use the identity cos (A + B) cos A cos B sin A sin
Question:
a. Use the identity cos (A + B) ≡ cos A cos B − sin A sin B, to show that cos 2A ≡ 2 cos2 A − 1
b. Show that the x-coordinates of the points where C1 and C2 intersect satisfy the equation cos 2x + 3 sin 2x − 3 = 0
Transcribed Image Text:
The curves C₁ and C₂ have equations C₁: y = 4 cos 2x C₂: y = 6 cos²x-3 sin 2x
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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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