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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.
Adderall and Mydayis[ 10 ] are trade names [ note 2 ] for a combination drug containing four salts of amphetamine. The mixture is composed of equal parts racemic amphetamine and dextroamphetamine, which produces a (3:1) ratio between dextroamphetamine and levoamphetamine, the two enantiomers of amphetamine. [ 12 ]
Methamphetamine[ note 1 ] (contracted from N-methylamphetamine) is a potent central nervous system (CNS) stimulant that is mainly used as a recreational or performance-enhancing drug and less commonly as a second-line treatment for attention deficit hyperactivity disorder and obesity. [ 23 ] It has also been researched as a potential treatment ...
Westend61/Getty Images. A main theory behind the cause of Alzheimer’s disease is the build-up of the protein amyloid-beta in the brain. Researchers from the University of Cincinnati provide ...
HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name.
Beta blocker. Skeletal formula of propranolol, the first clinically successful beta blocker. Beta blockers, also spelled β-blockers, are a class of medications that are predominantly used to manage abnormal heart rhythms (arrhythmia), and to protect the heart from a second heart attack after a first heart attack (secondary prevention). [1]
This writing system, unrelated to the Greek alphabet, last appeared in the thirteenth century BC. In the late ninth century BC or early eighth century BC, the Greek alphabet emerged. [2] The period between the use of the two writing systems, during which no Greek texts are attested, is known as the Greek Dark Ages.
www.catherinezetajones.com. Catherine Zeta-Jones CBE (/ ˈziːtə /; born 25 September 1969) [a] is a Welsh actress. Recognised for her versatility, she has received various accolades, including an Academy Award, a British Academy Film Award, and a Tony Award. In 2010, she was appointed Commander of the Order of the British Empire (CBE) for her ...