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The two figures below show 3D views of respectively atan2(y, x) and arctan( y / x ) over a region of the plane. Note that for atan2(y, x), rays in the X/Y-plane emanating from the origin have constant values, but for arctan( y / x ) lines in the X/Y-plane passing through the origin have constant
Atan may refer to: Mathematics. arctangent (atan), a trigonometric function atan2, the two-argument function implementing the arctangent in many computer languages;
Tôn Đức Thắng (Vietnamese pronunciation: [ton˧˧ ʔɗɨk̚˧˦ tʰaŋ˧˦]; August 20, 1888 – March 30, 1980) was the second president of Vietnam under the leadership of General Secretary Lê Duẩn.
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The following year, the Statistics Office created a new census category, "Nguoi Viet goc Hoa" (Vietnamese people of Chinese origin), whereby Vietnamese citizens of Chinese heritage were identified as such in all official documents. [154] No further major measures were implemented to integrate or assimilate the Chinese after 1964. [155]
The Tày people, also known as the Thổ, T'o, Tai Tho, Ngan, Phen, Thu Lao, or Pa Di, is a Central Tai-speaking ethnic group who live in northern Vietnam.According to a 2019 census, there are 1.8 million Tày people living in Vietnam. [6]
Dạ cổ hoài lang (Vietnamese: [zâːˀ ko᷉ hwâːj laːŋ], "Night Drum Beats Cause Longing for Absent Husband") is a Vietnamese song, composed circa 1918 by songwriter Cao Văn Lầu, colloquially known as "Sáu Lầu," from Bạc Liêu.
Bắc Ninh is a province of Vietnam, located in the Red River Delta of the northern part of the country. It is the smallest province of Vietnam by area and is situated to the east of the nation's capital, Hanoi, and borders Bắc Giang province, Hưng Yên province, Hải Dương province and Hanoi.