Some of the possible common medical causes of Extremity pain may include: 1  Brachial plexus lesions. 2  Carpel tunnel syndrome. 3  Biceps tendonitis.  Raynauds 1  phenomenon. Sickle cell anemia.  Black widow spider 1  bites. Polyneuropathy.  Cat scratch 1  disease. Post herpetic neuralgia.  Erythema nodosum.
In mathematics, a hyperbola (plural hyperbolas or hyperbolae) is a type of smooth curve, lying in a plane, defined by its geometric properties or by equations for which it is the solution set. A hyperbola is a curve where the distances of any point from: a fixed point (the focus), and. a fixed straight line (the directrix) are always in the same ratio. This ratio is called the eccentricity, and for a hyperbola it is always greater than 1.
Since the eccentricity of a hyperbola is always greater than one, the center B must lie outside of the reciprocating circle C. This definition implies that the hyperbola is both the locus of the poles of the tangent lines to the circle B, as well as the envelope of the polar lines of the points on B. Conversely, the circle B is the envelope of polars of points on the hyperbola, and the locus of poles of tangent lines to the hyperbola.