 | Samuel Heynes - 1701 - 334 páginas
...Therefore, S, B A. S, DA :: T, DTB for Equal Rectangles have their Sides reciprocally Proportional. RULE IV. The Tangents of the Sides, are reciprocally Proportional to the Co-fines of the Angles at the Vertex. For ( Î4) For hy the 4th Caíe/ T,BP.R::T,PA.SBPA. F1g.IlI. T,DP.R::T,PA.£DPA.... | |
 | John Harris - 1706 - 298 páginas
...AI S,BA:R::T,PA:T,B7 „ . And £- And «* *2.MO S,DA;R::T,PA:T,D 3 S,BA:S, DA::f , D:T,B RULE IV. The Tangents of the Sides are reciprocally proportional to the Co-fines of the Angles of the Vertex. For (by Cafe 4 of Right-angled A'S), J3P:T,PA.-.-R,S/BPA-) Eret And CT,BP:T,DP::S'... | |
 | Henry Wilson - 1761 - 580 páginas
...firft Terms in each, it is : As SC LP to SC LN, fo SC MP to SC MN. Conclufion the fourth. The Tangent of the Sides are reciprocally proportional to the Co-fines of the Vertical Angles. Let fall the Perpendicular NP as before, and then in the Triangle LNP the Side LN, and Fig. 104. Angle... | |
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RULE IV. The Tangents of the Sides, are reciprocally Proportional to the Co-fines of the Angles at the Vertex. 