New American Practical NavigatorU.S. Government Printing Office, 1880 |
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Αποτελέσματα 1 - 5 από τα 100.
Σελίδα
... tangent . Cosine , Cotangent , or Cosecant of an arc , signifies the sine , tangent , or secant of the complement of that arc respectively . signifies angle . A signifies triangle . A's , triangles . signifies a square . or , the sun ...
... tangent . Cosine , Cotangent , or Cosecant of an arc , signifies the sine , tangent , or secant of the complement of that arc respectively . signifies angle . A signifies triangle . A's , triangles . signifies a square . or , the sun ...
Σελίδα 6
... Tangent S R Versa Sine The TANGENT of an arc is a right line drawn perpendicular to the diameter , passing through one end of the arc , and terminated by a line drawn from the centre through the other end of the arc ; thus AT is the ...
... Tangent S R Versa Sine The TANGENT of an arc is a right line drawn perpendicular to the diameter , passing through one end of the arc , and terminated by a line drawn from the centre through the other end of the arc ; thus AT is the ...
Σελίδα 12
... tangent , & c . , of any arc in one circle , is to the chord , sine , tanget , & C . of the same arc in another , as ... tangent , AH the cotangent , CE the secant , and CH the cosecant of that arc BD . Then , since the triangles CDE ...
... tangent , & c . , of any arc in one circle , is to the chord , sine , tanget , & C . of the same arc in another , as ... tangent , AH the cotangent , CE the secant , and CH the cosecant of that arc BD . Then , since the triangles CDE ...
Σελίδα 13
... tangent BG , meeting CE produced in G ; draw the chord BA , and join CF , CA. Then , since the arc BF is 90 ° DF must be 90 ° ; whence ( by Art . 12 and 19 ) the radius CF is equal to the sine of the arc BF , or sine of 90 ° . Again ...
... tangent BG , meeting CE produced in G ; draw the chord BA , and join CF , CA. Then , since the arc BF is 90 ° DF must be 90 ° ; whence ( by Art . 12 and 19 ) the radius CF is equal to the sine of the arc BF , or sine of 90 ° . Again ...
Σελίδα 18
... tangent BT ; so will the line BT become a line of tangents . 7thly . Setting one foot of the compasses in C , extend the other to the several divisions , 10 , 20 , 30 , & c . , in the tangent line , BT , and transfer these extents ...
... tangent BT ; so will the line BT become a line of tangents . 7thly . Setting one foot of the compasses in C , extend the other to the several divisions , 10 , 20 , 30 , & c . , in the tangent line , BT , and transfer these extents ...
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
A.M. Hour angle apparent altitude azimuth calculation Cape central altitude centre chronometer column compass Corr correct altitude corresponding Cosecant Cosine course degrees difference of latitude difference of longitude Dist elapsed equal equator error EXAMPLE feet Funchal given Greenwich Half-sum horizon glass horizontal parallax Hour A.M. hour angle hypotenuse instrument Latitude and Departure lee-way line of numbers lower limb lunar observation mean meridian altitude method middle latitude miles minutes moon moon's Nautical Almanac nearly noon object observed altitude parallel perpendicular place of observation Plane Sailing planet points polar distance Prop proportional logarithm refraction remainder rule sea account Secant semidiameter sextant ship side sine star subtract sun's declination sun's right ascension Suppose Table XXVII taken tangent telescope transit traverse table triangle true altitude true distance true longitude variation wires zenith distance
Δημοφιλή αποσπάσματα
Σελίδα 11 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 15 - In any plane triangle, as the sum of the sides about the vertical angle is to their difference, so is the tangent of half the sum of the angles at the base to the tangent of half their difference.
Σελίδα 15 - 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. By Theorem II. we have a : b : : sin. A : sin. B.
Σελίδα 6 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Σελίδα 254 - Emersion (Em.) the instant of its reappearance at coming out of the shadow. They generally happen when the Satellite is apparently at some distance from the body of Jupiter, except near the opposition of Jupiter to the Sun, when the eclipse takes place near to the body of the planet.
Σελίδα 7 - In a right triangle, the side opposite the right angle is called the hypotenuse, and the other two sides the legs.
Σελίδα 233 - ... distance, to obtain the approximate Greenwich mean time corresponding to the given distance. If the distance between the Moon and a Star increased or decreased uniformly, the Greenwich...
Σελίδα 126 - ... to the depth of 80 or 100 fathoms ; then heave the log, and the number of knots run out in half a minute will be the miles the current sets per hour, and the bearing of the log will show the set of it. There is a very remarkable current, called the GULF STREAM, which sets in a north-east direction along the coast of America, from Cape Florida towards the Isle of Sables...
Σελίδα 148 - ... placed by the maker equidistant from each other and parallel to the middle one — therefore, when the middle one is adjusted, the others are so too ; he also places the two transverse wires at right angles to the vertical middle wire. These adjustments are always performed by the maker, and but little liable to derangement. When, however, they happen to get out of order, and the observer wishes to correct them, it is done by loosening the screws which hold the eye-end of the telescope in its...
Σελίδα 136 - ... to make the objects appear on the other wire ; if the contact still remains perfect, the axis of the telescope is in proper adjustment ; if not, it must be altered by moving the two screws which fasten, to the up-and-down piece, the collar into which the telescope screws. This adjustment is not very liable to be deranged.