Abstract
There are a number of ways of defining the trigonometrical ratios. The method of coordinates is used here, which also allows extension to any angle.
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© 1987 G. D. Buckwell
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Buckwell, G.D. (1987). Trigonometry. In: Work Out Mathematics GCSE. Macmillan Work Out Series. Palgrave, London. https://doi.org/10.1007/978-1-349-09462-2_13
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DOI: https://doi.org/10.1007/978-1-349-09462-2_13
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-44013-1
Online ISBN: 978-1-349-09462-2
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