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Viète. de Moivre. Euler. Fourier. v. t. e. In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.
The United States of America is a federal republic of 50 states, a federal district and 14 territories.It is located mostly in central North America.The U.S. has three land borders, two with Canada and one with Mexico, and has sea borders with Cuba, the Bahamas, the Dominican Republic, Bermuda and Russia, and is otherwise bounded by the Pacific Ocean, the Bering Sea, the Arctic Ocean and the ...
Los Angeles Unified School District (LAUSD) is a public school district in Los Angeles County, California, United States. It is the largest public school system in California in terms of number of students and the 2nd largest public school district in the United States, with only the New York City Department of Education having a larger student ...
An adult penis that is abnormally small but otherwise normally formed is referred to in medicine as a micropenis, with the cutoff usually being defined as around 3 inches (7.6 cm). A large, uncircumcised human penis, flaccid and erect. Flaccid length is a poor predictor for erect length.
The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that angle to the length of the longest side of the triangle (the hypotenuse), and the cosine is the ratio of the length of the adjacent leg to that of the hypotenuse.
Alchemy (from the Arabic word al-kīmīā, الكیمیاء) is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practised in China, India, the Muslim world, and Europe. [ 1 ]
Called the Siècle des Lumières, the philosophical movement of the Enlightenment had already started by the early 18th century, when Pierre Bayle launched the popular and scholarly Enlightenment critique of religion. As a skeptic Bayle only partially accepted the philosophy and principles of rationality.
The cross product with respect to a right-handed coordinate system. In mathematics, the cross product or vector product (occasionally directed area product, to emphasize its geometric significance) is a binary operation on two vectors in a three-dimensional oriented Euclidean vector space (named here ), and is denoted by the symbol .