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In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) [1] [2] are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.
Stephen William Hawking, CH, CBE, FRS, FRSA (8 January 1942 – 14 March 2018) was an English theoretical physicist, cosmologist, and author who was director of research at the Centre for Theoretical Cosmology at the University of Cambridge. [6] [17] [18] Between 1979 and 2009, he was the Lucasian Professor of Mathematics at Cambridge, widely ...
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.
In mathematics, the inverse trigonometric functions (occasionally also called arcus functions, [1] [2] [3] [4] [5] antitrigonometric functions [6] or cyclometric functions [7] [8] [9]) are the inverse functions of the trigonometric functions (with suitably restricted domains ).
Part of the Cold War, the Revolutions of 1989 and the Chinese democracy movement. Protesters in Tiananmen Square on 2 June (top), and tanks in Beijing in July (bottom) Date. Initial protests: 15 April – 4 June 1989. (1 month, 2 weeks and 6 days) Massacre: 3–4 June 1989. (1 day); 35 years ago.
The 2024 Summer Olympics ( French: Jeux olympiques d'été de 2024 ), officially the Games of the XXXIII Olympiad (French: Jeux de la XXXIIIe Olympiade) and officially branded as Paris 2024, is an upcoming international multi-sport event scheduled to take place from 26 July to 11 August 2024 in France, with Paris as the main host city and 16 other...
The United States of America is a federal republic [1] consisting of 50 states, a federal district ( Washington, D.C., the capital city of the United States), five major territories, and various minor islands. [2] [3] Both the states and the United States as a whole are each sovereign jurisdictions. [4]
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