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 53
... sun . Here if a and b are regarded as the sides of a right angled triangle , in which a de- notes the angle opposite to the side a , we shall have τα tana . But , since a is supposed greater than 6 , this angle will be greater than half ...
... sun . Here if a and b are regarded as the sides of a right angled triangle , in which a de- notes the angle opposite to the side a , we shall have τα tana . But , since a is supposed greater than 6 , this angle will be greater than half ...
Página 119
... sun once in a year , gives rise to an apparent motion of the sun about the earth in the same interval of time . The circle in which the sun appears to move is called the ecliptic ; the angle in which it crosses the equinoctiał the ...
... sun once in a year , gives rise to an apparent motion of the sun about the earth in the same interval of time . The circle in which the sun appears to move is called the ecliptic ; the angle in which it crosses the equinoctiał the ...
Página 120
... sun , or of any of the hea- venly bodies , from the equator , measured on an arc of the meridian , is called the ... sun's apparent motion through the twelve signs . 17. The longitude of a heavenly body is an arc of the ecliptic ...
... sun , or of any of the hea- venly bodies , from the equator , measured on an arc of the meridian , is called the ... sun's apparent motion through the twelve signs . 17. The longitude of a heavenly body is an arc of the ecliptic ...
Página 121
... sun when in either of them appears to be at a stand with regard to his decli- nation . 21. Colures are two secondaries to the equinoctial : one , passing through the equinoctial points , is called the equinoctial colure ; the other ...
... sun when in either of them appears to be at a stand with regard to his decli- nation . 21. Colures are two secondaries to the equinoctial : one , passing through the equinoctial points , is called the equinoctial colure ; the other ...
Página 131
... sun . The meridians and the parallels are herein divided mutually into degrees : those of the parallels are equal ; those of the meridians unequal ; for the ex- pression for one of their degrees is , ♪ tan } ( 4 + 1o ) — tan 14 = sin ...
... sun . The meridians and the parallels are herein divided mutually into degrees : those of the parallels are equal ; those of the meridians unequal ; for the ex- pression for one of their degrees is , ♪ tan } ( 4 + 1o ) — tan 14 = sin ...
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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