 | Robert Smith - Electronic books - 1738 - 402 pages
...of the radius diminished by the rectangle under the tangents: and the tangent of the difference of two angles, is to the difference of their tangents,...fquare of the radius, to the fquare of the radius increafedby the rectangle under the tangents. is to R 0, fo let R 0 be to RD; and RD will be the tangent... | |
 | Gerardus Beekman Docharty - Geometry - 1867 - 474 pages
...A— sin. B); or, sin. (A— B) : sin. A— sin. B : : sin. A+sin. B : sin. (A+B). That is, the sine of the difference of any two angles is to the difference of their sines as the tum of those sines is to the sine of their sum. Therefore, put A =2°, B=l°; then sin.... | |
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The tangent of the fum of two angles is to the fum of their tangents, as the fquare of the radius to the fquare of the radius diminished by the rectangle under the tangents : And the... 