Show that (1 + cosx) 2 + (1 cosx) 2 + 2 sin 2 x has
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Show that (1 + cosx)2 + (1 − cosx)2 + 2 sin2x has a constant value for all x and state this value.
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Expanding the square terms we get 1 cosx2 1 cosx2 2 sin2x 1 ...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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