The Projection and Calculation of the Sphere for Young Sea Officers Being a Complete Initiation Into Nautical AstronomyLongmans, Green, 1861 - 112 páginas |
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The Projection and Calculation of the Sphere for Young Sea Officers S M Saxby Sin vista previa disponible - 2018 |
Términos y frases comunes
9 A.M. declination azimuth circle calculation called centre chord of 60 circle by Prob complement construction cosine cotang declination 20 diff 2 sides draw a diameter draw an oblique Draw the oblique Draw the parallel drawn equal equator example extr conjunct extr disjunct figure Find side given side gnomonic projection half diff half sum half the difference half the sum horizon hour angle hour circle hypothenuse intersection latitude log tang logarithms meridian altitude Natural Numbers nautical astronomy navigator oblique circle opposite angle parallel of declination perpendicular projection radius right angles rule of sines scale of chords scale of semi-tangents secant side 70 sine diff sine of half sine of middle sine side BC sines 78 sphere spheric angles spheric triangle SPHERIC TRIGONOMETRY stereographic projection sun's place tangent trigonometry vulgar fraction zenith دو
Pasajes populares
Página 18 - The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles.
Página 18 - 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.
Página 19 - IF two straight lines cut one another, the vertical, or opposite, angles shall be equal.
Página 22 - IF a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles ; and the three interior angles of every triangle are equal to two right angles.
Página 56 - As any one side, Is to the sine of its opposite angle ; So is any other side, To the sine of its opposite angle.
Página 20 - The greater angle of every triangle is subtended by the greater side, or has the greater side opposite to it.
Página 21 - The angle at the centre of a circle is double of the angle at the circumference, upon the same base, that is, upon the same part of the circumference.
Página 78 - The sine of half the sum of two angles of a spherical triangle is 'to the sine of half their difference as the tangent of half the included side is to the tangent of half the difference of the other two sides.
Página 75 - As the cosine of half the sum of the two sides is to the cosine of half their difference, so is the cotangent of half the contained angle to the tangent of half the sum of the other two angles.