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
... positive after , that epoch . This theorem is found to an wer very well up to the time of Pytheas , 350 years before the Christian era . The obliquity at the beginning of 1816 is 23 27 492 . 20. The points where the tropics touch the ...
... positive after , that epoch . This theorem is found to an wer very well up to the time of Pytheas , 350 years before the Christian era . The obliquity at the beginning of 1816 is 23 27 492 . 20. The points where the tropics touch the ...
Página 137
... 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 with a vertical plane . 12. The intersection of the plane of the dial and ...
... 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 with a vertical plane . 12. The intersection of the plane of the dial and ...
Página 155
... positive when toward the elevated pole , will be regarded as negative when towards the contrary pole . Thus , with us , north latitudes and de- clinations will be positive , south latitudes and declina- tions , negative . Example I. The ...
... positive when toward the elevated pole , will be regarded as negative when towards the contrary pole . Thus , with us , north latitudes and de- clinations will be positive , south latitudes and declina- tions , negative . Example I. The ...
Página 156
... positive , their product is positive ; conseq . the longitude is in the first quad . Lastly , for p the angle of position , add together , Log sin i .... 23 ° 27 ′ 49 ′′ .... 9.6000647 cos l .... 68 ° 29 ′ 28 ′′ .... 9.5642090 sec d 16 ...
... positive , their product is positive ; conseq . the longitude is in the first quad . Lastly , for p the angle of position , add together , Log sin i .... 23 ° 27 ′ 49 ′′ .... 9.6000647 cos l .... 68 ° 29 ′ 28 ′′ .... 9.5642090 sec d 16 ...
Página 157
... positive , sin l is positive , and lies , therefore , either in the first or second quadrant , lis , therefore , either 55 ° 25 ′ 43 ′′ ( that is , 1 ' 25 ° 25 ′ 43 ′′ ) as above expressed , or its supple- ment 124 ° 34 ′ 17 ′′ , that ...
... positive , sin l is positive , and lies , therefore , either in the first or second quadrant , lis , therefore , either 55 ° 25 ′ 43 ′′ ( that is , 1 ' 25 ° 25 ′ 43 ′′ ) as above expressed , or its supple- ment 124 ° 34 ′ 17 ′′ , that ...
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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