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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 Walt Disney Company is an American multinational mass media and entertainment conglomerate that is headquartered at the Walt Disney Studios complex in Burbank, California. Disney was founded on October 16, 1923, by brothers Walt Disney and Roy Disney as Disney Brothers Cartoon Studio; it also operated under the names Walt Disney Studio and ...
In the United States, the Electoral College is the group of presidential electors that is formed every four years for the sole purpose of voting for the president and vice president. The process is described in Article II of the U.S. Constitution. [1] Each state appoints electors using legal procedures determined by its legislature, equal in ...
The White Nile is traditionally considered to be the headwaters stream. However, the Blue Nile is the source of most of the water of the Nile downstream, containing 80% of the water and silt. The White Nile is longer and rises in the Great Lakes region. It begins at Lake Victoria and flows through Uganda and South Sudan.
Human penis. In human anatomy, the penis ( / ˈpiːnɪs /; pl.: penises or penes; from the Latin pēnis, initially "tail" [1]) is an external male sex organ ( intromittent organ) that additionally serves as the urinary duct. The main parts are the root, body, the epithelium of the penis including the shaft skin, and the foreskin covering the glans.
Autism, also called autism spectrum disorder [a] ( ASD) or autism spectrum condition ( ASC ), [8] is a neurodevelopmental disorder marked by restricted and repetitive patterns of behavior and deficits in reciprocal social communication. Other common signs include perseverative interests, stereotypic body movements ( stimming ), rigid routines ...
Sildenafil, sold under the brand name Viagra, among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [4] [8] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon. [9] It is unclear if it is effective for treating sexual dysfunction in females. [8]
A Linux-based system is a modular Unix-like operating system, deriving much of its basic design from principles established in Unix during the 1970s and 1980s. Such a system uses a monolithic kernel, the Linux kernel, which handles process control, networking, access to the peripherals, and file systems.