a. Show that 4 sin 2 x 3 cos 2 x = 2 can be written
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a. Show that 4 sin2 x – 3 cos2 x = 2 can be written as 7 sin2 x = 5.
b. Hence solve, for 0 < x < 360°, the equation 4 sin2 x – 3 cos2 x = 2. Give your answers to 1 decimal place.
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Edexcel AS And A Level Mathematics Pure Mathematics Year 1/AS
ISBN: 9781292183398
1st Edition
Authors: Greg Attwood
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