Navigation New ModelledW. and J. Mount, 1761 - 528 pàgines |
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Navigation New Modelled: Or a Treatise of Geometrical, Trigonometrical ... Wilson Visualització completa - 1752 |
Navigation New Modelled: Or, a Treatise of Geometrical, Trigonometrical ... Henry Wilson Previsualització no disponible - 2018 |
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Passatges populars
Pàgina xiv - In any plane triangle, the sum of tfte two sides containing either angle, is to their difference, as the tangent of half the sum of the other two angles, to the tangent of half their difference.
Pàgina 185 - Multiply the moon's age by 4, and divide the product by 5 ; the quotient...
Pàgina xiv - Then as the sum of the sides is to their difference, so is the tangent of half the sum of the unknown angles to the tangent of half their difference (Theor.
Pàgina xiv - ... the sum of the segments of the base is to the sum of the sides as the difference of the sides to the difference of the segments of the base.
Pàgina 231 - ... of the opposite parts. All of the ten formulas just listed can easily be derived from these rules. Oblique Spherical Triangles.— Formulas for the solution of oblique spherical triangles are developed from those for right spherical triangles. The law of sines states that in any spherical triangle the sines of the sides are proportional to the sines of their opposite angles: sin a sin b sin с...
Pàgina xi - Circumference of every Circle is fuppofed to be Divided into 360 equal Parts called Degrees, and each Degree...
Pàgina 24 - Then radius : log. 179-3 :: s. 8° 31' : log. ofi6'5i; which doubled is the diftance between Edyftone and Lizard 53-04 miles. For the other two, there are 2 fides, and an angle oppofite to one of them, given, to find the other fide.
Pàgina 232 - Day, fubtradt the Complement of the Sun's Altitude, noting the half Sum, and the Remainder. 3. Then to find the Sun's Azimuth, it's thus ; to the Complement Arithmetic of the Sines of the Complement of the Latitude, and Complement of the Sun's Altitude, add the Sines of the aforefaid...
Pàgina 231 - Perpendicular, let it fall from the End of a given Side, and oppofite to a given Angle...
Pàgina 232 - The Tangents of the Bafes are proportional to the Tangents of the Angle at the Vertex.