a. Express 15sin 8 cos in the form Rsin( ) where R > 0 and
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a. Express 15sinθ − 8 cosθ in the form Rsin(θ − α) where R > 0 and 0° < α < 90°.
Give the value of α correct to 2 decimal places.
b. Hence solve the equation 15sinθ − 8 cosθ = 3 for 0° < θ < 360°.
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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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