A System of Plane and Spherical Trigonometry: To which is Added a Treatise on LogarithmsJ. & J.J. Deighton, 1831 - 330 pages |
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a+2 ß a+n ß a+ß a₁ B₁ base C₁ centre chord circle circumference cos a)² cosec cosine cot a cot decimal determined equal formulæ hence inscribed integer less than 90 loga logarithm loge magnitude method Napier's rules nearly negative perpendicular plane angles plane triangle polar triangle pole polygon positive integer PROB PROP quadrant quantities radius unity regular polyhedrons right-angled triangle sec a)2 SECTION Similarly sin A)2 sin ß sine solid angle sphere spherical angle spherical polygon spherical triangle substituting subtending sum the series surface tables tangent theorem three angles trigonometric functions variations vers Δα ηβ π α π π