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 134
... meridian semi- circles a , b , c , d , e , & c . one of which is the geographical 157 meridian of any given place , as London , 4 184 Dialling . Principles of dialling.
... meridian semi- circles a , b , c , d , e , & c . one of which is the geographical 157 meridian of any given place , as London , 4 184 Dialling . Principles of dialling.
Página 135
... meridian of any given place , as London , which it is supposed is at the point a ; then if the hour of 12 were marked at the equator , both upon that meridian and the oppo- site one , and all the rest of the hours in order on the other ...
... meridian of any given place , as London , which it is supposed is at the point a ; then if the hour of 12 were marked at the equator , both upon that meridian and the oppo- site one , and all the rest of the hours in order on the other ...
Página 136
... meridian , are called direct erect dials ; they face one or other of the four cardinal points . 8. All other erect dials are called declining dials . 9. Those dials whose planes are neither parallel nor perpendicular to the plane of the ...
... meridian , are called direct erect dials ; they face one or other of the four cardinal points . 8. All other erect dials are called declining dials . 9. Those dials whose planes are neither parallel nor perpendicular to the plane of the ...
Página 137
... meridian passing through the style is called the meridian of the dial , or 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 ...
... meridian passing through the style is called the meridian of the dial , or 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 ...
Página 138
... meridian , and , of course , reckon the hours alike . Let мz = l , and D ' comp . of zмa . Then PZ = 90 ° L would become PMPZ + ZM = - 1 + 1 = 90 ° — ( L — } ) . The right angled triangle мza , gives 90 ° - - tan ma➡ sin za tan мza ...
... meridian , and , of course , reckon the hours alike . Let мz = l , and D ' comp . of zмa . Then PZ = 90 ° L would become PMPZ + ZM = - 1 + 1 = 90 ° — ( L — } ) . The right angled triangle мza , gives 90 ° - - tan ma➡ sin za tan мza ...
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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