 | United States. Army. Corps of Engineers - Military engineering - 1873 - 350 pages
...the distance BC, then — r _ nr sin (O+J') _ r sin.y — ~i ~ 1~\ ' 1t /"• • 11 D s1n 1 G sin 1" In the us.e of this formula proper attention should be paid to the signs of sin (O +>') and sin^; for the first term will \^e positive when (O +JK) is less than 1800, (the reverse... | |
 | Henri Barré (prof. at Nancy.) - 1873 - 334 pages
...the distance А C ; and G the distance В C, then — c — or sin (O -KV) rsin у D sin 1" G sin 1" In the use of this formula proper attention should be paid to the signs of sin (O -\-y] and siniy; for the first term will be positive when (O + y) is less than 180°, (the reverse... | |
 | Thomas Jefferson Lee - Astronomy - 1873 - 334 pages
...C; I>the distance AC; and? G the distance BC, then@ C コ O+ 「ミ tn 卍品耳が一こま;器リ In the use of this formula proper attention should be paid to the signs of sin (O +j) and sin_y; for the first term will be posi tive when (O +y) is less than 180, (the reverse with... | |
 | Herbert Michael Wilson - Camping - 1900 - 986 pages
...A = (in seconds) -==— : r/ v ' Dsm I and r = n 4• sin (° + j) D sin i" sin i . . (66) . . (67) In the use of this formula proper attention should be paid to the signs of sin (O -\- y) and sin y; for the first term will be positive when (O -f- y) is less than 180° (the reverse... | |
 | Herbert Michael Wilson - Camping - 1900 - 988 pages
...; hence B = (in seconds) g *.'" *,, , . . . (66) and C- OA1 r sn £sin i" Gsin i" • • • (67> In the use of this formula proper attention should be paid to the signs of sin (O -{-}') and sin y; for the first term will be positive when (O -\- y) is less than 180° (the reverse... | |
 | Herbert Michael Wilson - Camping - 1900 - 964 pages
...i" ; hence A = (in seconds) -= r sin y sin I and r = (9 4; r sin Z>sin i" Gsin i" . . (66) . . (67) In the use of this formula proper attention should be paid to the signs of sin (O -}- y) and sin y; for the first term will be positive when (O -f- y) is less than 180° (the reverse... | |
 | Geology - 1903 - 988 pages
...sin 1"; hence B= (in seconds) ,rs. ' and .,, sin 1" >_ Q. r sin (Q±y) _ r sin y ^T Dsinl" Gsinl"' In the use of this formula, proper attention should be paid to the signs of sin (Q+.y) and sin y\ for the first term will be positive only when {Q+//) is less than ISO0 (the reverse... | |
 | Mathematical geography - 1903 - 306 pages
...equal to A sin 1" and В sin 1"; hence B=(in seconds) :' s?p У, G sm 1 and r,_o+ r sinJQ±y) _ r sin g In the use of this formula, proper attention should be paid to the signs of sin (Q+y) and sin g; for the first term will be positive onlv when (Q+y) is less than 180° (the reverse... | |
 | Geological Survey (U.S.) - Geology - 1903 - 338 pages
...very small, they may be regarded as equal to A sin 1" and В sin 1"; hence and s*n (Q^y) _ r sin У In the use of this formula, proper attention should be paid to the signs of sin (Q+y) and sin y; for the first term will be positive only when (Q+y) is less than 180° (the reverse... | |
 | Arthur James Collier - Tin ores - 1904 - 858 pages
...regarded as equal to A sin 1" and B sin 1", respectively; hence r sin y and B=(m _ r sinJQ±?/) r sin y In the use of this formula, proper attention should be paid to the signs of sin (Q+y) and sin y; for the first term will he positive onlv when (Q+y) is less than 180° (the reverse... | |
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As the angles at A and B are very small, they may be regarded as equal to A sin i... 