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The Proof by Projection of the Addition Theorem in Trigonometry
Published online by Cambridge University Press: 20 January 2009
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The object of this paper is to remove the difficulty that arises in giving a general proof by projection methods of this theorem, without in any way interfering with the single-valuedness of the position of a radius vector tracing out angles from a given initial position, when the values of the trigonometrical ratios are given.
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- Research Article
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- Copyright © Edinburgh Mathematical Society 1904
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