An introduction to the theory ... of plane and spherical trigonometry ... including the theory of navigation1839 |
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Αποτελέσματα 1 - 5 από τα 66.
Σελίδα xxvii
... hypothenuse is a constant quantity 5. In any OBLIQUE - ANGLED spherical triangle , supposing an angle and its adjacent side to remain constant , it is required to find the ratio of the differentials of the other parts 6. To find the ...
... hypothenuse is a constant quantity 5. In any OBLIQUE - ANGLED spherical triangle , supposing an angle and its adjacent side to remain constant , it is required to find the ratio of the differentials of the other parts 6. To find the ...
Σελίδα 28
... hypothenuse ; the other two , AB and BC , are called the legs , or sides , or the base and perpendicular . A Hypoth Р Base B Perp ( 68 ) The sum of the three angles of every plane triangle is equal to 180 ° ; hence in a right - angled ...
... hypothenuse ; the other two , AB and BC , are called the legs , or sides , or the base and perpendicular . A Hypoth Р Base B Perp ( 68 ) The sum of the three angles of every plane triangle is equal to 180 ° ; hence in a right - angled ...
Σελίδα 29
... hypothenuse is equal to the square - root of the sum of the squares of the base and perpendicular : and the square - root of the difference of the squares of the hypothenuse and either of the other sides , is equal to the remaining side ...
... hypothenuse is equal to the square - root of the sum of the squares of the base and perpendicular : and the square - root of the difference of the squares of the hypothenuse and either of the other sides , is equal to the remaining side ...
Σελίδα 33
... hypothenuse AC be made the radius of a circle , it is evident that the perpendicular BC is the sine of the angle A , and that AB is the cosine thereof . But the sine of either of the acute angles of a right - angled triangle is the ...
... hypothenuse AC be made the radius of a circle , it is evident that the perpendicular BC is the sine of the angle A , and that AB is the cosine thereof . But the sine of either of the acute angles of a right - angled triangle is the ...
Σελίδα 34
... hypothenuse be the radius of a circle . Because the triangles exc and ABC are similar , ce : AC :: viz . rad : hypoth . :: Ее • sin c = cos A Again , because the triangles And and ABC are similar , Ad : AC :: Dd AB base . BC viz . rad ...
... hypothenuse be the radius of a circle . Because the triangles exc and ABC are similar , ce : AC :: viz . rad : hypoth . :: Ее • sin c = cos A Again , because the triangles And and ABC are similar , Ad : AC :: Dd AB base . BC viz . rad ...
Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...
Σελίδα 23 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees...
Σελίδα 330 - Method of correcting the apparent distance of the Moon from the Sun, or a Star, for the effects of Parallax and Refraction.