a. Express 9 cos + 40 sin in the form R cos ( ),
Question:
a. Express 9 cos θ + 40 sin θ in the form R cos (θ − α), where R > 0 and 0 < α < 90°. Give the value of α to 3 decimal places.
b.
Calculate:
i. The minimum value of g(θ)
ii. The smallest positive value of θ at which the minimum occurs.
Transcribed Image Text:
g(0) = 18 50+ 9 cos 0 + 40 sin 0² 0≤0≤2T
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a To express 9 cos 0 40 sin in the form R cosa we can use trigonometric identities Lets start by fin...View the full answer
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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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