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Trigonometrical

Note: Co["o]rdinates are of several kinds, consisting in some of the different cases, of the following elements, namely: (a) (Geom. of Two Dimensions) The abscissa and ordinate of any point, taken together; as the abscissa PY and ordinate PX of the point P (Fig. 2, referred to the co["o]rdinate axes AY and AX. (b) Any radius vector PA (Fig. 1), together with its angle of inclination to a fixed line, APX, by which any point A in the same plane is referred to that fixed line, and a fixed point in it, called the pole, P. (c) (Geom. of Three Dimensions) Any three lines, or distances, PB, PC, PD (Fig. 3), taken parallel to three co["o]rdinate axes, AX, AY, AZ, and measured from the corresponding co["o]rdinate fixed planes, YAZ, XAZ, XAY, to any point in space, P, whose position is thereby determined with respect to these planes and axes. (d) A radius vector, the angle which it makes with a fixed plane, and the angle which its projection on the plane makes with a fixed line line in the plane, by which means any point in space at the free extremity of the radius vector is referred to that fixed plane and fixed line, and a fixed point in that line, the pole of the radius vector. Cartesian co["o]rdinates. See under Cartesian. Geographical co["o]rdinates, the latitude and longitude of a place, by which its relative situation on the globe is known. The height of the above the sea level constitutes a third co["o]rdinate. Polar co["o]rdinates, co["o]rdinates made up of a radius vector and its angle of inclination to another line, or a line and plane; as those defined in (b) and (d) above. Rectangular co["o]rdinates, co["o]rdinates the axes of which intersect at right angles. Rectilinear co["o]rdinates, co["o]rdinates made up of right lines. Those defined in (a) and (c) above are called also Cartesian co["o]rdinates. Trigonometrical or Spherical co["o]rdinates, elements of reference, by means of which the position of a point on the surface of a sphere may be determined with respect to two great circles of the sphere. Trilinear co["o]rdinates, co["o]rdinates of a point in a plane, consisting of the three ratios which the three distances of the point from three fixed lines have one to another.

Note: Co["o]rdinates are of several kinds, consisting in some of the different cases, of the following elements, namely: (a) (Geom. of Two Dimensions) The abscissa and ordinate of any point, taken together; as the abscissa PY and ordinate PX of the point P (Fig. 2, referred to the co["o]rdinate axes AY and AX. (b) Any radius vector PA (Fig. 1), together with its angle of inclination to a fixed line, APX, by which any point A in the same plane is referred to that fixed line, and a fixed point in it, called the pole, P. (c) (Geom. of Three Dimensions) Any three lines, or distances, PB, PC, PD (Fig. 3), taken parallel to three co["o]rdinate axes, AX, AY, AZ, and measured from the corresponding co["o]rdinate fixed planes, YAZ, XAZ, XAY, to any point in space, P, whose position is thereby determined with respect to these planes and axes. (d) A radius vector, the angle which it makes with a fixed plane, and the angle which its projection on the plane makes with a fixed line line in the plane, by which means any point in space at the free extremity of the radius vector is referred to that fixed plane and fixed line, and a fixed point in that line, the pole of the radius vector. Cartesian co["o]rdinates. See under Cartesian. Geographical co["o]rdinates, the latitude and longitude of a place, by which its relative situation on the globe is known. The height of the above the sea level constitutes a third co["o]rdinate. Polar co["o]rdinates, co["o]rdinates made up of a radius vector and its angle of inclination to another line, or a line and plane; as those defined in (b) and (d) above. Rectangular co["o]rdinates, co["o]rdinates the axes of which intersect at right angles. Rectilinear co["o]rdinates, co["o]rdinates made up of right lines. Those defined in (a) and (c) above are called also Cartesian co["o]rdinates. Trigonometrical or Spherical co["o]rdinates, elements of reference, by means of which the position of a point on the surface of a sphere may be determined with respect to two great circles of the sphere. Trilinear co["o]rdinates, co["o]rdinates of a point in a plane, consisting of the three ratios which the three distances of the point from three fixed lines have one to another.

- navigation. Trigonometry is known for its many identities. These trigonometric identities are commonly used for rewriting trigonometrical expressions...

- In mathematics, trigonometric integrals are a family of integrals involving trigonometric functions. The different sine integral definitions are Si ...

- In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are real functions which relate...

- temporary trigonometrical stations are set up near construction sites for monitoring the precision and progress of construction. Some trigonometrical stations...

- The Great Trigonometrical Survey was a project which aimed to survey the entire Indian subcontinent with scientific precision. It was begun in 1802 by...

- Papyrus) and Babylonian mathematics. Trigonometry was also prevalent in Ku****e mathematics. Systematic study of trigonometric functions began in ****enistic...

- In mathematics, the inverse trigonometric functions (occasionally also called arcus functions, antitrigonometric functions or cyclometric functions) are...

- In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for...

- Zygmund, Antoni (1952), Trigonometrical series, New York: Chelsea Publishing Co., MR 0076084 Zygmund, Antoni (1955), Trigonometrical series, Dover Publications...

- Spherical trigonometry is the branch of spherical geometry that deals with the relationships between trigonometric functions of the sides and angles of...

- In mathematics, trigonometric integrals are a family of integrals involving trigonometric functions. The different sine integral definitions are Si ...

- In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are real functions which relate...

- temporary trigonometrical stations are set up near construction sites for monitoring the precision and progress of construction. Some trigonometrical stations...

- The Great Trigonometrical Survey was a project which aimed to survey the entire Indian subcontinent with scientific precision. It was begun in 1802 by...

- Papyrus) and Babylonian mathematics. Trigonometry was also prevalent in Ku****e mathematics. Systematic study of trigonometric functions began in ****enistic...

- In mathematics, the inverse trigonometric functions (occasionally also called arcus functions, antitrigonometric functions or cyclometric functions) are...

- In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for...

- Zygmund, Antoni (1952), Trigonometrical series, New York: Chelsea Publishing Co., MR 0076084 Zygmund, Antoni (1955), Trigonometrical series, Dover Publications...

- Spherical trigonometry is the branch of spherical geometry that deals with the relationships between trigonometric functions of the sides and angles of...

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