An Introduction to the Theory and Practice of Plain and Spherical Trigonometry: And the Stereographic Projection of the Sphere : Including the Theory of Navigation ...Longman, Rees, Orme, Brown, and Green, 1826 - 442 sider |
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Resultat 1-5 av 27
Side xxiii
... altitude of a fixed star to find its true altitude .275 . 276 10. Given the ... apparent time of day - break in the morning , and the end of twilight in the ... apparent time of his centre ap- pearing in the eastern or western part of the ...
... altitude of a fixed star to find its true altitude .275 . 276 10. Given the ... apparent time of day - break in the morning , and the end of twilight in the ... apparent time of his centre ap- pearing in the eastern or western part of the ...
Side xxiv
... altitude , to find the azimuth · · 14. Given the latitude of the place , the sun's declin- ation and altitude , to ... apparent distance of the moon from the sún , or from a star , and their apparent zenith dis- tances , to find their ...
... altitude , to find the azimuth · · 14. Given the latitude of the place , the sun's declin- ation and altitude , to ... apparent distance of the moon from the sún , or from a star , and their apparent zenith dis- tances , to find their ...
Side xxv
... apparent noon , from equal altitudes of the sun 13. The error in taking the altitude of a star being given , to find the corresponding error in the hour angle 14. The error in the altitude of any tower , or other object , is to the ...
... apparent noon , from equal altitudes of the sun 13. The error in taking the altitude of a star being given , to find the corresponding error in the hour angle 14. The error in the altitude of any tower , or other object , is to the ...
Side 87
... apparent , or ob- served angle of elevation is always greater than the true angle . ( U ) The altitudes of the heavenly bodies when within 50 or 6 ° of the horizon , should never be used where a very accurate result is required . The ...
... apparent , or ob- served angle of elevation is always greater than the true angle . ( U ) The altitudes of the heavenly bodies when within 50 or 6 ° of the horizon , should never be used where a very accurate result is required . The ...
Side 95
... apparent place : and the point in which it would be seen at the same instant from the centre of the earth , is called its true place , the difference between the true and apparent place is called the pa- rallax in altitude . B D. 3011 ...
... apparent place : and the point in which it would be seen at the same instant from the centre of the earth , is called its true place , the difference between the true and apparent place is called the pa- rallax in altitude . B D. 3011 ...
Vanlige uttrykk og setninger
acute angle CAB Answer apparent altitude azimuth base centre circle co-tangent compasses complement construction cosec cosine degrees diff difference of latitude difference of longitude draw ecliptic equator Euclid find the angle formulæ given side greater Greenwich Hence horizon horizontal parallax hypoth hypothenuse less line of numbers line of sines log sine measured meridian miles moon's N.sine N.cos natural number Naut Nautical Almanac noon North oblique observed obtuse opposite angle parallax parallel perpendicular plane sailing Plate pole prime vertical PROPOSITION quadrant Rad x sine rad2 radius rhumb line right angles right ascension right-angled spherical triangle RULE scale of chords SCHOLIUM secant side AC sine A sine sine BC Sine Co-sine sphere spherical angle spherical triangle ABC Spherical Trigonometry star star's subtract sun's declination supplement tables tang tangent of half three angles three sides Trigonometry true altitude versed sine
Populære avsnitt
Side 21 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Side 2 - And if the given number be a proper vulgar fraction ; subtract the logarithm of the denominator from the logarithm of the numerator, and the remainder will be the logarithm sought ; which, being that of a decimal fraction, must always have a negative index.
Side 28 - The CO-SINE of an arc is the sine of the complement of that arc as L.
Side 107 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Side 31 - An angle at the circumference of a circle is measured by half the arc that subtends it. Let BAC be an angle at the circumference : it has for its measure half the arc "BC, which subtends it.
Side 136 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Side 258 - The HORIZON is a great circle which separates the visible half of the heavens from the invisible ; the earth being considered as a point in the centre of the sphere of the fixed stars.
Side 28 - The SECANT of an arc, is a straight line drawn from the center, through one end of the arc, and extended to the tangent which is drawn from the other end.
Side 27 - The sine, or right sine, of an arc, is the line drawn from one extremity of the arc, perpendicular to the diameter passing through the other extremity. Thus, BF is the sine of the arc AB, or of the arc BDE.