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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.
Lieutenant General Đỗ Cao Trí (20 November 1929 – 23 February 1971) was a general in the Army of the Republic of Vietnam (ARVN) known for his fighting prowess and flamboyant style.
In mathematics, hyperbolic functions are analogues of the ordinary trigonometric functions, but defined using the hyperbola rather than the circle.Just as the points (cos t, sin t) form a circle with a unit radius, the points (cosh t, sinh t) form the right half of the unit hyperbola.
Nguyễn Phú Trọng (Vietnamese: [ŋwiən˦ˀ˥ fu˧˦ t͡ɕawŋ͡m˧˨ʔ] ⓘ new-yen foo chong; [1] 14 April 1944 – 19 July 2024) was a Vietnamese politician and communist theorist who served as general secretary of the Communist Party of Vietnam from 2011 until his death in 2024.
The Tri-Cities of Virginia (also known as the Tri-City area or the Appomattox Basin) is an area in the Greater Richmond Region which includes the three independent cities of Petersburg, Colonial Heights, and Hopewell and portions of the adjoining counties of Chesterfield, Dinwiddie, and Prince George in south-central Virginia.
Speciation diagram for a 10-millimolar solution of citric acid. The violet curve corresponds to the trisodium citrate. As a conjugate base of a weak acid, citrate can perform as a buffering agent or acidity regulator, resisting changes in pH.
The Planck constant, or Planck's constant, denoted by , [1] is a fundamental physical constant [1] of foundational importance in quantum mechanics: a photon's energy is equal to its frequency multiplied by the Planck constant, and the wavelength of a matter wave equals the Planck constant divided by the associated particle momentum.
An antistatic wrist strap with crocodile clip. An antistatic device is any device that reduces, dampens, or otherwise inhibits electrostatic discharge, or ESD, which is the buildup or discharge of static electricity.