| 1751 - 399 sider
...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 - 216 sider
...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 - 264 sider
...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 - 431 sider
...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
...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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