Unknown

Unknown or The Unknown may refer to:

Mathematics

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Side (disambiguation)

Side is a town in the Antalya province of Turkey.

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Jeff Mills

Jeff Mills (born 18 June 1963, Detroit, Michigan) is an American techno DJ and producer Mills is a founder of Underground Resistance, a techno collective formed with 'Mad' Mike Banks in the late 1980s. While Mills left the group to explore his own ventures, the collective continues to be a mainstay of Detroit's music scene. He went by The Wizard, a DJ alias he used since the early 1980s, retiring the name in 2013.

Mills is the founder and owner of Axis Records, a record label he founded in 1992. The label is based in Chicago, Illinois and is responsible for the release of much of his solo work.

Mills has received recognition for his work both as a DJ and producer. Eminem mentioned Mills in the lyrics to a song and he was knighted Ordre des Arts et des Lettres by the French Ministry of Culture. Mills was also featured in Man From Tomorrow, a documentary about techno music that he produced along with French filmmaker Jacqueline Caux. He continued working in film, releasing Life to Death and Back, a film he shot in the Egyptian wing of the Louvre Museum where he also had a four-month residency.

Trigonometric functions

In mathematics, the trigonometric functions (also called the circular functions) are functions of an angle. They relate the angles of a triangle to the lengths of its sides. Trigonometric functions are important in the study of triangles and modeling periodic phenomena, among many other applications.

The most familiar trigonometric functions are the sine, cosine, and tangent. In the context of the standard unit circle (a circle with radius 1 unit), where a triangle is formed by a ray originating at the origin and making some angle with the x-axis, the sine of the angle gives the length of the y-component (the opposite to the angle or the rise) of the triangle, the cosine gives the length of the x-component (the adjacent of the angle or the run), and the tangent function gives the slope (y-component divided by the x-component). More precise definitions are detailed below. Trigonometric functions are commonly defined as ratios of two sides of a right triangle containing the angle, and can equivalently be defined as the lengths of various line segments from a unit circle. More modern definitions express them as infinite series or as solutions of certain differential equations, allowing their extension to arbitrary positive and negative values and even to complex numbers.

Special right triangle

A special right triangle is a right triangle with some regular feature that makes calculations on the triangle easier, or for which simple formulas exist. For example, a right triangle may have angles that form simple relationships, such as 45°–45°–90°. This is called an "angle-based" right triangle. A "side-based" right triangle is one in which the lengths of the sides form ratios of whole numbers, such as 3 : 4 : 5, or of other special numbers such as the golden ratio. Knowing the relationships of the angles or ratios of sides of these special right triangles allows one to quickly calculate various lengths in geometric problems without resorting to more advanced methods.

Angle-based

"Angle-based" special right triangles are specified by the relationships of the angles of which the triangle is composed. The angles of these triangles are such that the larger (right) angle, which is 90 degrees or π/2 radians, is equal to the sum of the other two angles.

The side lengths are generally deduced from the basis of the unit circle or other geometric methods. This approach may be used to rapidly reproduce the values of trigonometric functions for the angles 30°, 45°, and 60°.