The Tangents of 15° and of 22½°

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I. Let ABO be a triangle in which = 30°, B = 60°, C = 90°.

Produce AC to D so that AD = AB. Join BD.

Type: Research Article
Information: Edinburgh Mathematical Notes , Volume 7 , April 1911 , pp. 73 - 74

DOI: https://doi.org/10.1017/S1757748900000797 [Opens in a new window]

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The Tangents of 15° and of 22½°

Volume 7
Peter Ramsay
DOI: https://doi.org/10.1017/S1757748900000797

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The Tangents of 15° and of 22½°

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