a. Show that the equation 8sin 2 + 2 cos 2 cos = 6
Question:
a. Show that the equation 8sin2θ + 2 cos2θ − cosθ = 6 can be written in the form 6 cos2θ + cosθ − 2 = 0.
b. Hence, solve the equation 8sin2θ + 2 cos2θ − cosθ = 6 for 0° ≤ θ ≤ 360°.
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a We start by using the trigonometric identity sin cos 1 to rewrite the equation 8sin 2cos cos 6 Usi...View the full answer
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Related Book For
Cambridge International AS And A Level Mathematics Pure Mathematics 1 Coursebook
ISBN: 9781108407144
1st Edition
Authors: Sue Pemberton, Julian Gilbey
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