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  2. List of common coordinate transformations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_coordinate...

    The value for must be solved for in this manner because for all values of , ⁡ is only defined for < < +, and is periodic (with period ). This means that the inverse function will only give values in the domain of the function, but restricted to a single period.

  3. Polar coordinate system - Wikipedia

    en.wikipedia.org/wiki/Polar_coordinate_system

    The calculation is essentially the conversion of the equatorial polar coordinates of Mecca (i.e. its longitude and latitude) to its polar coordinates (i.e. its qibla and distance) relative to a system whose reference meridian is the great circle through the given location and the Earth's poles and whose polar axis is the line through the ...

  4. Pole and polar - Wikipedia

    en.wikipedia.org/wiki/Pole_and_polar

    More generally, the polars of all the points on the line q must pass through its pole Q. The relationship between poles and polars is reciprocal. Thus, if a point A lies on the polar line q of a point Q, then the point Q must lie on the polar line a of the point A. The two polar lines a and q need not be parallel.

  5. Del in cylindrical and spherical coordinates - Wikipedia

    en.wikipedia.org/wiki/Del_in_cylindrical_and...

    This article uses the standard notation ISO 80000-2, which supersedes ISO 31-11, for spherical coordinates (other sources may reverse the definitions of θ and φ): . The polar angle is denoted by [,]: it is the angle between the z-axis and the radial vector connecting the origin to the point in question.

  6. Cylindrical coordinate system - Wikipedia

    en.wikipedia.org/wiki/Cylindrical_coordinate_system

    The three coordinates (ρ, φ, z) of a point P are defined as: The radial distance ρ is the Euclidean distance from the z-axis to the point P.; The azimuth φ is the angle between the reference direction on the chosen plane and the line from the origin to the projection of P on the plane.

  7. Navigational algorithms - Wikipedia

    en.wikipedia.org/wiki/Navigational_Algorithms

    Obtaining the height line Marcq St. Hilaire. The navigational algorithms are the quintessence of the executable software on portable calculators or smartphones as an aid to the art of navigation, this attempt article describe both algorithms and software for smartphones implementing different calculation procedures for navigation.

  8. Which other presidents have pardoned relatives? Trump is on ...

    www.aol.com/other-presidents-pardoned-relatives...

    He joins a short list of others who have taken similar actions - including Trump himself. More: Hunter Biden pardon 'unprecedented' and 'very unusual,' experts say.

  9. Polar topology - Wikipedia

    en.wikipedia.org/wiki/Polar_topology

    List of topologies – List of concrete topologies and topological spaces; Locally convex topological vector space – A vector space with a topology defined by convex open sets; Polar set – Subset of all points that is bounded by some given point of a dual (in a dual pairing) Topologies on spaces of linear maps; Topology consistent with the ...