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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.
Wikipedia is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.Wikipedia is the largest and most-read reference work in history, and is consistently ranked among the ten most visited websites; as of April 2024, it was ranked fourth by Semrush, and seventh by Similarweb.
Cover of the November 1933 issue. The Spider was an American pulp magazine published by Popular Publications from 1933 to 1943. Every issue included a lead novel featuring the Spider, a heroic crime-fighter. The novels in the first two issues were written by R. T. M. Scott; thereafter every lead novel was credited to "Grant Stockbridge", a ...
Richard I (8 September 1157 – 6 April 1199), known as Richard Cœur de Lion ( Norman French: Quor de Lion) [1] [2] or Richard the Lionheart because of his reputation as a great military leader and warrior, [3] [4] [5] was King of England from 1189 until his death in 1199. He also ruled as Duke of Normandy, Aquitaine, and Gascony; Lord of ...
Christopher Columbus[b] (/kəˈlʌmbəs/;[2] between 25 August and 31 October 1451 – 20 May 1506) was an Italian[3][c] explorer and navigator from the Republic of Genoa who completed four Spanish-based voyages across the Atlantic Ocean sponsored by the Catholic Monarchs, opening the way for the widespread European exploration and European ...
Charles I (19 November 1600 – 30 January 1649) [a] was King of England, Scotland, and Ireland from 27 March 1625 until his execution in 1649. Charles was born into the House of Stuart as the second son of King James VI of Scotland, but after his father inherited the English throne in 1603, he moved to England, where he spent much of the rest ...
Charles Bronson (born Charles Dennis Buchinsky; November 3, 1921 – August 30, 2003) was an American actor. He was known for his roles in action films and his "granite features and brawny physique". Bronson was born into extreme poverty in Ehrenfeld, Pennsylvania, a coal mining town in the Allegheny Mountains. Bronson's father, a miner, died ...
