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5 天前 · What links here Related changes Upload file Special pages Permanent link Page information Cite this page Get shortened URL Download QR code In mathematics, sine and cosine are trigonometric functions of an angle.The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that ...
1 天前 · The House of Habsburg (/ ˈ h æ p s b ɜːr ɡ /, German: Haus Habsburg, pronounced [haʊ s ˈhaːpsˌbʊʁk] ), also known as the House of Austria, is one of the most prominent and important dynasties in European history. The house takes its name from Habsburg Castle, a fortress built in the 1020s in present-day Switzerland by Radbot of Klettgau, who named his fortress Habsburg.
- 11th century
3 天前 · 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.
1 天前 · The Cambodian genocide [a] was the systematic persecution and killing of Cambodian citizens [b] by the Khmer Rouge under the leadership of Prime Minister of Democratic Kampuchea, Pol Pot. It resulted in the deaths of 1.5 to 2 million people from 1975 to 1979, nearly 25% of Cambodia's population in 1975 ( c. 7.8 million).
3 天前 · The Baroque (UK: / b ə ˈ r ɒ k / bə-ROK, US: /-ˈ r oʊ k /- ROHK; French:) or Baroquism is a Western style of architecture, music, dance, painting, sculpture, poetry, and other arts that flourished from the early 17th century until the 1750s. It followed Renaissance art and Mannerism and preceded the Rococo (in the past often referred to as "late Baroque") and Neoclassical styles.
1 天前 · Fibonacci sequence. A tiling with squares whose side lengths are successive Fibonacci numbers: 1, 1, 2, 3, 5, 8, 13 and 21. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn .
9 小時前 · Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia.It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain.It borders the Tibet Autonomous Region of China to the north, and India to the south, east, and west, while it is narrowly separated from Bangladesh by the Siliguri Corridor, and from Bhutan by the Indian ...
