 | Euclid, John Playfair - Euclid's Elements - 1795 - 462 pages
...increafed by the bafe of the triangle, and the other the fum of the fame fides diminifhed by the bafe, as the fquare of the radius to the fquare of the co-fine of half the angle included between the two fides of the triangle. The fame conftruftion being made as in the laft... | |
 | Alexander Ingram - Trigonometry - 1799 - 374 pages
...to the ( reftangle contained by half the fum of the three fides and its excefs above the bafe BC, as the fquare of the radius to the fquare of the cofine of half the angle BAC. In BA produced, take AD equal to AC ; and join DC, and draw * AE, BF perpendicular to DC... | |
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... the bafe, as the fquare of the radius to the fquare of the co-fine of half the angle included between the two fides of the triangle. 