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 135
... hour of 12 were marked at the equator , both upon that meridian and the oppo- site one , and all the rest of the ... line of the dial , when it fell upon the like hour circle of the sphere . If the plane which intersects the sphere be ...
... hour of 12 were marked at the equator , both upon that meridian and the oppo- site one , and all the rest of the ... line of the dial , when it fell upon the like hour circle of the sphere . If the plane which intersects the sphere be ...
Página 136
... hour circles , obtain the hour lines for every variety of dial . And since the earth it- self compared with its distance from the sun , may , in reference to this branch of inquiry , be regarded as a point , if a small sphere of glass ...
... hour circles , obtain the hour lines for every variety of dial . And since the earth it- self compared with its distance from the sun , may , in reference to this branch of inquiry , be regarded as a point , if a small sphere of glass ...
Página 137
... hour line of 12 . 13. Those meridians passing through the style , which make angles of 15 ° , 30 ° , 45 ° , & c . with the meridian of the place ( marking the hour line of 12 ) are called hour circles , and their intersections with the ...
... hour line of 12 . 13. Those meridians passing through the style , which make angles of 15 ° , 30 ° , 45 ° , & c . with the meridian of the place ( marking the hour line of 12 ) are called hour circles , and their intersections with the ...
Página 138
... hour line to the meri- dian . Now , we may regard the dial whose plane coincides with mar , as a vertical or erect dial at the place whose zenith is м , where м and z are on the same meridian , and , of course , reckon the hours alike ...
... hour line to the meri- dian . Now , we may regard the dial whose plane coincides with mar , as a vertical or erect dial at the place whose zenith is м , where м and z are on the same meridian , and , of course , reckon the hours alike ...
Página 139
... hour line to the meridian : the first term is constant ; the second has a constant coefficient to the variable quantity cot P , which undergoing all its changes of General Problem . 139.
... hour line to the meridian : the first term is constant ; the second has a constant coefficient to the variable quantity cot P , which undergoing all its changes of General Problem . 139.
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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