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Euler's formula, named after Leonhard Euler, is a mathematical formula in complex analysis that establishes the fundamental relationship between the trigonometric functions and the complex exponential function. Euler's formula states that, for any real number x, one has. where e is the base of the natural logarithm, i is the imaginary unit, and ...
60,000 Indigenous Americans forcibly relocated to Indian Territory. The Trail of Tears was the forced displacement of approximately 60,000 people of the "Five Civilized Tribes" between 1830 and 1850, and the additional thousands of Native Americans within that were ethnically cleansed by the United States government.
Elvis Presley. / 35.04611°N 90.02306°W / 35.04611; -90.02306. Elvis Aaron Presley [a] (January 8, 1935 – August 16, 1977), also known mononymously as Elvis, was an American singer and actor. Known as the "King of Rock and Roll", he is regarded as one of the most significant cultural figures of the 20th century.
Frederick Douglass (born Frederick Augustus Washington Bailey, c. February 1817 or February 1818 [a] – February 20, 1895) was an American social reformer, abolitionist, orator, writer, and statesman. He became the most important leader of the movement for African-American civil rights in the 19th century. After escaping from slavery in ...
The Cold War was a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc, that started in 1947, two years after the end of World War II and lasted to 1991, the fall of the Soviet Union. The term cold war is used because there was no large-scale fighting ...
Franklin Delano Roosevelt [a] (January 30, 1882 – April 12, 1945), commonly known by his initials FDR, was an American statesman and politician who served as the 32nd president of the United States from 1933 until his death in 1945. He was a member of the Democratic Party and is the only U.S. president to have served more than two terms.