Elements of Plane and Spherical Trigonometry: With Their Applications to Heights and Distances Projections of the Sphere, Dialling, Astronomy, the Solution of Equations, and Geodesic OperationsBaldwin, Cradock, and Joy, 1816 - 244 páginas |
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Página 120
... declination ; north or south , according as the body is situated north or south of the equator . 15. Secondaries to the celestial equator are called circles of declination ; of these , twenty - four , which di- vide the equator into ...
... declination ; north or south , according as the body is situated north or south of the equator . 15. Secondaries to the celestial equator are called circles of declination ; of these , twenty - four , which di- vide the equator into ...
Página 124
... declination of the parallel ; GT COS D sin D COS D tan L tan D tan L sin DT ' ( 4. ) From the same triangle we have , also , CT = sin ampl . = cos azim . = CG COS GCT ==== .... sin D ( 5. ) COS L 33. Through the point E , a projected ...
... declination of the parallel ; GT COS D sin D COS D tan L tan D tan L sin DT ' ( 4. ) From the same triangle we have , also , CT = sin ampl . = cos azim . = CG COS GCT ==== .... sin D ( 5. ) COS L 33. Through the point E , a projected ...
Página 132
... declinations . Then the ecliptic is traced , as well as its poles , the circles of latitude all intersecting mutually at those two poles , and then the parallels to the ecliptic . Thus , on the radius marked 270 ° , at a distance cr ...
... declinations . Then the ecliptic is traced , as well as its poles , the circles of latitude all intersecting mutually at those two poles , and then the parallels to the ecliptic . Thus , on the radius marked 270 ° , at a distance cr ...
Página 137
... declination of the plane . It will be denoted by D , and will be regarded as positive when the decli- nation is towards the north , negative when it is towards the south . 11. The inclination , 1 , of a plane is the angle which it makes ...
... declination of the plane . It will be denoted by D , and will be regarded as positive when the decli- nation is towards the north , negative when it is towards the south . 11. The inclination , 1 , of a plane is the angle which it makes ...
Página 138
... declination ; Ps drawn per- pendicular to MT will be the position of the substyle ; and мb is the inclination of the hour line to the meri- dian . Now , we may regard the dial whose plane coincides with mar , as a vertical or erect dial ...
... declination ; Ps drawn per- pendicular to MT will be the position of the substyle ; and мb is the inclination of the hour line to the meri- dian . Now , we may regard the dial whose plane coincides with mar , as a vertical or erect dial ...
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Términos y frases comunes
altitude angled spherical triangle azimuth base becomes bisect centre chap chord circle circle of latitude computation consequently cos² cosec cosine cotangent declination deduced determine dial diameter difference distance draw earth ecliptic equa equal equation Example find the rest formulæ given side h cos h half Hence horizon hour angle hypoth hypothenuse intersecting latitude logarithmic longitude measured meridian obliq oblique opposite angle parallel perpendicular plane angles plane triangle pole problem prop quadrant radius right angled spherical right angled triangle right ascension right line sec² secant sin A sin sin² sine solid angle sphere spherical excess spherical trigonometry star substyle sun's supposed surface tan² tangent theorem three angles three sides tion triangle ABC values versed sine versin vertical angle whence zenith