a. Express 15sin 8 cos in the form R sin( - ),where R > 0 and
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a. Express 15sin − 8 cos in the form R sin(θ - α),where R > 0 and 0° < α < ,90°.
Give the value of α correct to 2 decimal places.
b. Hence solve the equation 15sin − 8 cosθ = 10 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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