An Introduction to the Theory and Practice of Plane and Spherical Trigonometry, and the Stereographic Projection of the Sphere: Including the Theory of NavigationLongman, Hurst, Rees, Orme, and Brown, 1820 - 442 pages |
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Page xxv
... noon , from equal altitudes of the sun .. 13. The error in taking the altitude of a star being given , to find the corresponding error in the hour angle 14. The error in the altitude of any tower , or other object , is to the error ...
... noon , from equal altitudes of the sun .. 13. The error in taking the altitude of a star being given , to find the corresponding error in the hour angle 14. The error in the altitude of any tower , or other object , is to the error ...
Page 264
... noon , the time when the sun comes to the meridian , or 12 o'clock , as shewn by a sun - dial . ( N ) True , or mean noon , twelve o'clock as shewn by a well regulated chronometer , so adjusted as to go 24 hours in a mean solar day ...
... noon , the time when the sun comes to the meridian , or 12 o'clock , as shewn by a sun - dial . ( N ) True , or mean noon , twelve o'clock as shewn by a well regulated chronometer , so adjusted as to go 24 hours in a mean solar day ...
Page 267
... noon , and every hour of the day , four minutes later . * The astronomical day begins at noon , and is counted forward to 24 hours , or the succeeding noon , when the next day begins , being 12 hours later than the civil day , which ...
... noon , and every hour of the day , four minutes later . * The astronomical day begins at noon , and is counted forward to 24 hours , or the succeeding noon , when the next day begins , being 12 hours later than the civil day , which ...
Page 268
... noon at a place in 60 ° East longitude ? Answer , 20 hours , on the preceding day . 2. What Greenwich time answers to noon at a place in lon- gitude 60 ° West ? Answer , 4 hours . 3. Find the time at Greenwich when it is 19h.42 ' at a ...
... noon at a place in 60 ° East longitude ? Answer , 20 hours , on the preceding day . 2. What Greenwich time answers to noon at a place in lon- gitude 60 ° West ? Answer , 4 hours . 3. Find the time at Greenwich when it is 19h.42 ' at a ...
Page 270
... noon at Greenwich : the variation of the sun's declination in that time . This variation must be added to the sun's declination at noon , * or subtracted from it , according as the declination is increasing or decreasing . NOTE . By a ...
... noon at Greenwich : the variation of the sun's declination in that time . This variation must be added to the sun's declination at noon , * or subtracted from it , according as the declination is increasing or decreasing . NOTE . By a ...
Other editions - View all
An Introduction to the Theory and Practice of Plain and Spherical ... Thomas Keith No preview available - 2017 |
An Introduction to the Theory and Practice of Plain and Spherical ... Thomas Keith No preview available - 2014 |
Common terms and phrases
acute altitude Answer apparent altitude azimuth base centre circle co-tangent complement construction cosec cosine degrees diff difference of latitude difference of longitude draw ecliptic equator Euclid find the angle formulæ given side greater Greenwich half the sum Hence horizon horizontal parallax hypoth hypothenuse less log sine mean arc measured meridian miles moon's N.sine N.cos natural number Naut Nautical Almanac noon North oblique observed obtuse parallax perpendicular plane triangle Plate pole PROPOSITION quadrant rad rad rad sine Rad x sine rad2 radius rhumb line right angles right ascension right-angled spherical triangle RULE sailed SCHOLIUM secant shewn side AC sine A sine sine BC sphere spherical angle spherical triangle ABC spherical trigonometry star star's straight line subtract sun's declination supplement tang tangent tangent of half three angles three sides Trigonometry true versed sine