i. Express cos x + 3 sin x in the form R cos (x ), where
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i. Express cos x + 3 sin x in the form R cos (x − α), where R > 0 and 0° < α < 90°, giving the exact value of R and the value of α correct to 2 decimal places.
ii Hence solve the equation cos 2θ + 3sin 2θ = 2, for 0° < θ < 90°.
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i To express cos x 3 sin x in the form R cos x we need to find values for R and such that cos x 3 si...View the full answer
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Related Book For
Cambridge International AS & A Level Mathematics Pure Mathematics 2 & 3 Coursebook
ISBN: 9781108407199
1st Edition
Authors: Sue Pemberton, Julianne Hughes, Julian Gilbey
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