Books Books
I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
First Part of an Elementary Treatise on Spherical Trigonometry - Page 8
by Benjamin Peirce - 1836 - 71 pages

## Plane and Spherical Trigonometry

Alfred Hix Welsh - Plane trigonometry - 1894 - 230 pages
...in Theorems X and XI are known as Napier1s Analogies. THEOREM XII. In any right spherical triangle, the sine of the middle part is equal to the product of the tangents of the adjacent parts. For, sin b cot с — sin A cot С „7 „ ._ .,.,. cos A = ; . ....

George Albert Wentworth - Navigation - 1895 - 436 pages
...immediately adjacent are called adjacent parts, and the other two are called opposite parts. Rule I. The, sine of the middle part is equal to the product of the i&ngents of the uaja'-ent parts. Rule II. The sine of the middle part is equal to the product of the...

## Plane and Spherical Trigonometry, Surveying and Tables

George Albert Wentworth - Surveying - 1895 - 422 pages
...immediately adjacent are called adjacent parts, and the other two are called opposite parts. Rule I. The sine of the middle part is equal to the product of the tuX\gents of the tAjacent parts. Rule II. The sine of the middle part is equal to the product of the...

## New Plane and Spherical Trigonometry

Webster Wells - Trigonometry - 1896 - 242 pages
...: I. The sine of the middle part is equal to the product of the tangents of the adjacent parts. EL The sine of the middle part is equal to the product of the cosines of the opposite parts. 142. Napier's rules may be proved by taking each circular part in succession as the...

## A Treatise on Elementary Geometry: With Appendices Containing a Collection ...

William Chauvenet - Geometry - 1896 - 274 pages
...not being considered, the two sides including it are regarded as adjacent parts. The rules are : I. The sine of the middle part is equal to the product of the tangents of the adjacent farts. II. The sine of the middle part is equal to the product of the cosines...

## New Plane and Spherical Trigonometry

Webster Wells - Trigonometry - 1896 - 236 pages
...are called the adjacent parts, and the remaining two the opposite parts. Then Napier's rules are : I. The sine of the middle part is equal to the product of the tangents of the adjacent parís. II. The sine of the middle part is equal to the product of the cosines...

## Plane and Spherical Trigonometry, Surveying and Tables

George Albert Wentworth - Logarithms - 1897 - 384 pages
...immediately adjacent are called adjacent parts, and the other two are called opposite parts. Rule I. The sine of the middle part is equal to the product of the t&ngents of the Adjacent parts. Rule II. The sine of the middle, part is equal to the product of the...

## Pamphlets in Philology and the Humanities, Volume 2

English language - 1897 - 726 pages
...the application of the rules : « a = b b sin A = tan A. tan B cos A = C sin B = c a cos B = a C 1 The sine of the middle part is equal to the product of the tangents of the adjacent parts. 2 The sine of the middle part is equal to the product of the cosines...