A Treatise on Plane and Spherical Trigonometry: With Their Most Useful Practical ApplicationsJ. Johnson, 1806 - 419 páginas |
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Página 50
... object will not appear in its true place at o , but will be seen in the direction ET , which is a tangent to the curve at the point E ; and therefore the apparent angle of elevation TEH will be greater than the true 50.
... object will not appear in its true place at o , but will be seen in the direction ET , which is a tangent to the curve at the point E ; and therefore the apparent angle of elevation TEH will be greater than the true 50.
Página 186
... apparent altitude . ( w ) The more elevated a planet is above the horizon , the less is its parallax , its distance from the earth's centre continuing the same . When the planet is in the zenith it has no parallax , and when in the ...
... apparent altitude . ( w ) The more elevated a planet is above the horizon , the less is its parallax , its distance from the earth's centre continuing the same . When the planet is in the zenith it has no parallax , and when in the ...
Página 187
... apparent altitude is that which has been cor- rected for the dip of the horizon , without considering the effect of refraction or parallax . The true altitude is that which is found after making all the corrections arising from the dip ...
... apparent altitude is that which has been cor- rected for the dip of the horizon , without considering the effect of refraction or parallax . The true altitude is that which is found after making all the corrections arising from the dip ...
Página 188
... apparent change of place in the stars , arising from the motion of the earth combined with the motion of light . The achronical rising or setting of a planet , or star , is when it rises at sun - set , or sets at sun - rise ; and the ...
... apparent change of place in the stars , arising from the motion of the earth combined with the motion of light . The achronical rising or setting of a planet , or star , is when it rises at sun - set , or sets at sun - rise ; and the ...
Página 189
... apparent , mean , and sidereal time . Apparent time is that shown by the sun ; being rec koned from the instant of his passing over any meridian , in one day , to the instant of his passing over it the next . Sidereal time is that which ...
... apparent , mean , and sidereal time . Apparent time is that shown by the sun ; being rec koned from the instant of his passing over any meridian , in one day , to the instant of his passing over it the next . Sidereal time is that which ...
Otras ediciones - Ver todas
A Treatise on Plane and Spherical Trigonometry: With Their Most Useful ... John Bonnycastle Sin vista previa disponible - 2014 |
A Treatise on Plane and Spherical Trigonometry: With Their Most Useful ... John Bonnycastle Sin vista previa disponible - 2018 |
Términos y frases comunes
A B C acute adjacent angle Aldebaran ambiguous azimuth centre complement cos² cosec cosine describe a circle diff difference distance draw the diameters ecliptic equal equation Example extent will reach find the rest former formulæ given leg given side Given two sides greater than 90 Greenwich height horizon hypothenusal angle incd latitude leg BC less than 90 Log sine logarithms longitude meridian moon's oblique oblique-angled spherical triangle observed obtuse opposite angle parallax perpendicular plane triangle point of aries points pole quadrantal spherical triangle radius required to find right ascension right-angled spherical triangle RULE scale of chords secant semitangent side AC sides and angles sin a sin sin² sines sphere spherical angle spherical triangle ABC spherical trigonometry star subtracted sun's declination supplement tangents THEOREM three angles three sides trigonometry whence
Pasajes populares
Página xxxi - 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.
Página 6 - ... for the second term, and the greater for the first ; and in either case multiply the second and third terms together, and divide the product by the first for the answer, which will always be of the same denomination as the third term.
Página 329 - 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.
Página 363 - The sum of any two sides of a spherical triangle is greater than the third side, and their difference is less than the third side.
Página vii - The rectangle contained by the diagonals of a quadrilateral inscribed in a circle is equal to the sum of the two rectangles contained by its opposite sides.
Página 13 - To find the other side: — as the sum of the two given sides is to their difference, so is the tangent of half the sum of their opposite angles to the tangent of half their difference...
Página 17 - As the base or sum of the segments Is to the sum of the other two sides, So is the difference of those sides To the difference of the segments of the base.
Página 2 - SECANT of an arc, is a straight line drawn from the centre, through one end of the arc, and extended to the tangent which is drawn from the other end.
Página 181 - The AMPLITUDE of any object in the heavens is an arc of the horizon, contained between the centre of the object when rising, or setting, and the east or west points of the horizon. Or, it is...
Página 75 - Having given two sides and an angle opposite to one of them, or two angles and a side opposite to one of them.