An introduction to the theory ... of plane and spherical trigonometry ... including the theory of navigation1839 |
Inni boken
Resultat 1-5 av 49
Side 52
... north and west , viz . between N and w ; the north and east , viz . between N and E ; the south and west , viz . between s and w ; or south and east , viz . between s and E. ( 130 ) The practice of Mercator's sailing is only the ...
... north and west , viz . between N and w ; the north and east , viz . between N and E ; the south and west , viz . between s and w ; or south and east , viz . between s and E. ( 130 ) The practice of Mercator's sailing is only the ...
Side 74
... north point of the needle rests in a direction of about 24 ° 30 ' westward of the true north . EXAMPLE XXIII . Having occasion to travel through the counties of Kent and Surrey , I perceived the fort built by Lady James on Shooter's ...
... north point of the needle rests in a direction of about 24 ° 30 ' westward of the true north . EXAMPLE XXIII . Having occasion to travel through the counties of Kent and Surrey , I perceived the fort built by Lady James on Shooter's ...
Side 261
... north pole , the other the south pole ; and the points lying directly opposite to them , on the terrestrial sphere , are the north and south poles of the earth . + ( 513 ) The equator or equinoctial is a great circle which divides the ...
... north pole , the other the south pole ; and the points lying directly opposite to them , on the terrestrial sphere , are the north and south poles of the earth . + ( 513 ) The equator or equinoctial is a great circle which divides the ...
Side 262
... north of the ecliptic is called the north or ascending node , and is marked thus ; the other the south or descending node , and is marked thus 8. The names and characters of the planets are as follow : - O The Sun * Mercury > The Moon ...
... north of the ecliptic is called the north or ascending node , and is marked thus ; the other the south or descending node , and is marked thus 8. The names and characters of the planets are as follow : - O The Sun * Mercury > The Moon ...
Side 263
... the ecliptic in the points of cancer and capricorn ; they are the limits of the sun's progress to the north and south of the equinoctial . ( 533 ) The zenith distance of any celestial object s 1 CHAP . X. 263 ASTRONOMICAL DEFINITIONS .
... the ecliptic in the points of cancer and capricorn ; they are the limits of the sun's progress to the north and south of the equinoctial . ( 533 ) The zenith distance of any celestial object s 1 CHAP . X. 263 ASTRONOMICAL DEFINITIONS .
Vanlige uttrykk og setninger
acute altitude angle CAB arc BF base centre complement construction cosec cosine cotangent degrees diff difference of latitude distance division draw ecliptic equator Euclid extent will reach find the angle formulæ given angle given side greater Greenwich half the sum Hence horizon hypoth less line of numbers line of sines logarithm logarithmic sine mean arc measure meridian moon's natural number Nautical Almanac observed obtuse opposite angles parallax parallel perpendicular plane sailing Plate pole primitive PROPOSITION quadrant rad2 radius rhumb line right angles right ascension right-angled plane triangle right-angled spherical triangle right-angled triangle RULE scale of chords scale of equal SCHOLIUM secant semi-tangents side AC side opposite sin² sphere spherical angle spherical triangle ABC spherical trigonometry straight line subtract supplement Tang tangent of half three angles three sides Trigonometry versed sine
Populære avsnitt
Side 109 - 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 141 - Consequently, a line drawn from the vertex of an isosceles triangle to the middle of the base, bisects the vertical angle, and is perpendicular to the base.
Side 33 - 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 29 - 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.
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 116 - C = sin. A sin. B sin. C; dividing both sides of this equation by cos. A cos. B cos. C, we have sin. A sin. B sin. C _ sin.
Side 362 - Now it is plain, that if any great circle of the sphere (as 1, 2, 3.) be divided into any number of equal parts, and through the points of division...
Side 23 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees...
Side 330 - Method of correcting the apparent distance of the Moon from the Sun, or a Star, for the effects of Parallax and Refraction.