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5 天前 · Basis of trigonometry: if two right triangles have equal acute angles, they are similar, so their corresponding side lengths are proportional. In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.
2 天前 · Chongqing[a] is a municipality in Southwestern China. Chongqing is one of the four direct-administered municipalities under the Central People's Government, along with Beijing, Shanghai, and Tianjin. It is the only directly administrated municipality located deep inland.[14] The municipality covers a large geographical area roughly the size of ...
2 天前 · Numerical value, notation, and units The speed of light in vacuum is usually denoted by a lowercase c, for "constant" or the Latin celeritas (meaning 'swiftness, celerity'). In 1856, Wilhelm Eduard Weber and Rudolf Kohlrausch had used c for a different constant that was later shown to equal √ 2 times the speed of light in vacuum. . Historically, the symbol V was used as an alternative symbol ...
3 天前 · Akira Toriyama (Japanese: 鳥山明, Hepburn: Toriyama Akira, April 5, 1955 – March 1, 2024) was a Japanese manga artist and character designer.He first achieved mainstream recognition for creating the popular manga series Dr. Slump, before going on to create Dragon Ball (his most famous work) and acting as a character designer for several popular video games such as the Dragon Quest series ...
2 天前 · Alexander Zverev ( German pronunciation: [alɛkˈsandɐ ˈtsfeːʁɛf]; [4] [5] [6] born 20 April 1997) is a German professional tennis player. He has been ranked by the ATP as high as world No. 2. Zverev's singles career highlights include a gold medal at the 2020 Tokyo Olympics, and titles at the 2018 and the 2021 ATP Finals.
