The angle " ? " = " ? " + 90?is used for a mathematical description in a spherical coordinate system.
12.
This gives you the Mars'position in a spherical coordinate system centered on the Sun, so it tells you exactly where Mars will be.
13.
Conventionally, a spherical coordinate system is used, with the target placed at the origin and the-axis of this coordinate system aligned with the incident beam.
14.
As the spherical coordinate system is only one of many three-dimensional coordinate systems, there exist equations for converting coordinates between the spherical coordinate system and others.
15.
As the spherical coordinate system is only one of many three-dimensional coordinate systems, there exist equations for converting coordinates between the spherical coordinate system and others.
16.
Just as the two-dimensional Cartesian coordinate system is useful on the plane, a two-dimensional spherical coordinate system is useful on the surface of a sphere.
17.
:: Or, you can use the spherical coordinate system; simply express each person's position using latitude, longitude, and perhaps elevation above mean sea level.
18.
The expression of the electric field radiated at a distance r far from the antenna is, adopting complex notation in spherical coordinate system ( r; \ theta; \ phi ):
19.
The Lebedev grid is often employed in the numerical evaluation of volume integrals in the spherical coordinate system, where it is combined with a one-dimensional integration scheme for the radial coordinate.
20.
The delta function has only radial dependence, so the Laplace operator ( a . k . a . scalar Laplacian ) in the spherical coordinate system simplifies to ( see del in cylindrical and spherical coordinates)
