 | 1751 - 420 páginas
...it follows, by Equality, that as the Tangent of half the Sum of the unknown Angles in one Triangle, is to the Tangent of half their Difference, fo is the Tangent of half the Sum of the unknown Angles in the other Triangle, to the Tangent of half their Difference. But if the... | |
 | Antoine-René Mauduit - 1768 - 252 páginas
...the tangent of half the difference cf the fegments of the bafe-, and the fécond this ; The coßne of half the fum of the angles at the bafe is to the coftne cf half their difference, as the tangent of half the difference of their oppofttefides is io... | |
 | Euclid - 1776 - 326 páginas
...a. DC as S. D is to S. B B. PROP. XXIH. TN every* fpherical triangle, the cotangent of half thefum of the * angles at the bafe, is to the tangent of half their difference ; as the tangent of half the vertical angle to the tangent of the angle that the perpendicular makes... | |
 | John McGregor (teacher of mathematics.) - 1792 - 532 páginas
...BC are parallel, EC : CF as EB :. BG, that is, the fum of the fides is to their difference : as the tangent of half the fum of the angles at the bafe, is to the tarn. Cent of half their difference. THEOTHEOREM III. in a plane triangle, the bafe is to the fum of... | |
 | Thomas Hodson - 1806 - 488 páginas
...from the middle of the bafe. Theorem VI. In any fpherical triangle ABC ffig. i2), As the cotangent of half the fum of the angles at the bafe, is to the...half their difference, fo is the tangent of half the vertii cal angle, to the tangent of the angle which the perpendicular CD makes with the line CF, bifefling... | |
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ABC, it will be, as the co -tangent of half the fum of the angles at the bafe, is to the tangent of half their difference, fo is the tangent of half the... 