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A' . cos z =— .- — ;t cos A cos A ' and in the triangle mzs, cos d — sin « sin a' cos z = cos a cos a hence, for the determination of D, we have this equation, viz., cos D — sin A sin A' cos d — sin a sin a
Elements of Trigonometry, Plane and Spherical: Adapted to the Present State ... - Page 174
by Charles William Hackley - 1838 - 307 pages

## Elements of Plane and Spherical Trigonometry: With Its Applications to the ...

John Radford Young - 1833 - 286 pages
...have, cos. D — sin. A sin. A' cos.Z = cos. A cos. A' ' and in the triangle mZs, cos. d — sin. a sin. a' cos. Z = ; ; cos. a cos. a hence, for the...d — sin. a sin. a cos. A cos. A' cos. a cos. a' from which we immediately get ,. cos. A cos. A' cos. D = (cos. a — sin. asm. a) -- r + sin. A sin....

## Elements of Plane and Spherical Trigonometry: With it Applications to the ...

John Radford Young - 1848 - 412 pages
...cos. a' hence, for the determination of D, we have this equation, viz. cos. D — sin. A sin. A' _ cos, d — sin, a sin, a' cos. A cos. A' cos. a cos. a' from which we immediately get ,. cos. A cos. A' , cos. D = (cos. d — sin. a sin. a') — 4- sin....

## A Treatise on Trigonometry, Plane and Spherical: With Its Application to ...

Charles William Hackley - 1851 - 524 pages
...cos D — sin A sin A' cos z = and in the triangle mza cos z = St COS A COS A cos d — gin a sin a' cos a cos a hence, for the determination of D, we...A' cos d — sin a sin a' cos A cos A' cos a cos a' from which we immediately get ,. cos A cos A' cos D = (cos d — sin a sm a ) -+ sin A sin A cos a...

## A Treatise on Trigonometry, Plane and Spherical: With Its Application to ...

Charles William Hackley - 1851 - 536 pages
...a' hence, for the determination of D, we have this equation, viz., cos D — sin A sin A' cos rf — sin a sin a' cos A cos A cos a cos a from which we immediately get / , . ,. COB A cos A' cos D = (cos d — sm a sm o 1 1- sin A sin A cos...

## Archiv der Mathematik und Physik, Volume 24

Johann August Grunert - 1855 - 568 pages
...A', A, 'und A1 bezeichnen, so haben wir die bekannte Relation: . cos A — sin A sin A, _ cosJ' — sin A' sin A,' cos A cos A, cos A' cos A/ welche allen diesen Untersuchungen zur Grundlage dient, indem es darauf ankommt, die wahre Distanz...