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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 Internet (or internet) [a] is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) [b] to communicate between networks and devices. It is a network of networks that consists of private, public, academic, business, and government networks of local to global scope, linked by a broad array of ...
Gmail is the email service provided by Google. As of 2019, it had 1.5 billion active users worldwide, making it the largest email service in the world. [1] It also provides a webmail interface, accessible through a web browser, and is also accessible through the official mobile application. Google also supports the use of third-party email ...
Australia, officially the Commonwealth of Australia, [18] is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. [19] Australia is the largest country by area in Oceania and the world's sixth-largest country.
Manny Pacquiao has won world championships in eight weight divisions, more than any other boxer in history. The Klitschko brothers, Vitali and Wladimir, held all four major titles in the heavyweight division from 2011 to 2013; they were the first brothers to hold versions of the heavyweight championship at the same time.
Ethnologue (2023). The following languages are listed as having 45 million or more total speakers in the 26th edition of Ethnologue published in 2023. This section does not include entries that Ethnologue identifies as macrolanguages encompassing all their respective varieties, such as Arabic, Lahnda, Persian, Malay, Pashto, and Chinese.
The history of the Internet has its origin in the efforts of scientists and engineers to build and interconnect computer networks. The Internet Protocol Suite, the set of rules used to communicate between networks and devices on the Internet, arose from research and development in the United States and involved international collaboration ...
A German officer executes Jewish women who survived a mass execution outside the Mizocz Ghetto, 14 October 1942. During World War II, the Axis Powers in Europe led by Nazi Germany participated in the extermination of millions of Poles, Jews, Gypsies and others in the genocide known as the Holocaust.