Abul Wafa Muhammad Ibn Muhammad Ibn Yahya Ibn Ismail al-Buzjani ( Events Births Brian Boru, high king of Ireland Abul-Wafa, iranian mathematician Deaths ar-Radi (Caliph of Baghdad) Athelstan, who was succeeded by his half-brother, Edmund Categories: 940 ... 940 – Events City of Gdansk is founded Saint Adalbert of Prague is sent to Prussia by Boleslaus I of Poland Samuil of Bulgaria crowned Tsar by Pope Gregory V Births Deaths Saint Adalbert of Prague, martyrdom Categories: 997 ... 997 or Events Benedictine abbey founded at Sherborne Births Deaths Abul-Wafa, iranian mathematician Categories: 998 ... 998) was a Persia or Persian most often refer to: Persia The Persians, an ethnic group, also called Tajiks Persian language Persian (Pokémon) See also Iranian, Iranian peoples, Iranian languages and Aryan. The terms can also refer to topics in: Persian culture and history Persian architecture Persian art Persian calendar Persian carpet... Persian A mathematician is a person whose area of study and research is mathematics. Roles Mathematicians not only study, but also research, and this must be given prominent mention here, because a misconception that everything in mathematics is already known is widespread among persons not learned in that field. In fact... mathematician and Wikipedia does not yet have an article with this exact name. Start the AstroNomer article If you have created this page in the past few minutes and it has not yet appeared, it may not be visible due to a delay in updating the database. Please wait and check again... astronomer. He was born in Buzjan, Tomb of Omar Khayyam, Neishabur Nishapur (or Neyshâbûr; نیشابور in Persian) is a town in the province of Khorasan in northeastern Iran, situated in a fertile plain at the foot of the Binalud Mountains, near the regional capital of Mashhad. The region... Nishapur in Iran ( Persia: ایران) is a Middle Eastern country located in southwestern Asia that until 1935 was referred to in the West as Persia. The name Iran is a modern cognate of Aryan meaning Land of the Aryans. Iran borders Pakistan (909km of border) and Afghanistan (936km... Iran.

He devised a wall quadrant for the accurate Astronomy, which etymologically means law of the stars, (from Greek: αστρονομία = άστρον + νόμος) is a science involving the observation and explanation of events occurring outside Earth and its atmosphere. It studies the... astronomy measurement of the declination of stars. He also introduced the tangent function and improved methods of calculating trigonometric tables and developed novel ways of solving some problems of spherical triangles.

He established the relations:

Sin(a+b) = Sin a Cos b + Cos a Sin b

Cos2a = 1 - 2Sin²a

Sin2a = 2 Sina Cosa

and dicovered the Sine formula for spherical geometry:

SinA/Sina = SinB/Sinb = SinC/Sinc

In Events October 1 - Edwy, king of England dies and is succeeded by his brother Edgar. Dunstan becomes bishop of Worcester, England and London Births Emperor Enyu of Japan Deaths October 1 - King Edwy of England Categories: 959 ... 959 A.D. he moved to The Republic of Iraq is a Middle Eastern country in southwestern Asia encompassing the ancient region of Mesopotamia. It shares borders with Kuwait and Saudi-Arabia to the south, Jordan to the west, Syria to the north-west, Turkey to the north, and Iran to the east. Its current leadership... Iraq. He studied Mathematics is commonly defined as the study of patterns of structure, change, and space; more informally, one might say it is the study of figures and numbers. Mathematical knowledge is constantly growing, through research and application, but mathematics itself is not usually considered a natural science. One reason is that... mathematics and worked principally in the field of Trigonometry (from the Greek trigonon = three angles and metro = measure) is a branch of mathematics dealing with angles, triangles and trigonometric functions such as sine and cosine. It has some relationship to geometry, though there is disagreement on exactly what that relationship is; for some, trigonometry is just a subtopic... trigonometry. He wrote a number of books, most of which no longer exist. He also studied the movements of the For other moons in the solar system see natural satellite. For other uses see Moon (disambiguation). Crust composition Oxygen 43% Silicon 21% Aluminium 10% Calcium 9% Iron 9% Magnesium 5% Titanium 2% Nickel 0.6% Sodium 0.3% Chromium 0.2% Potassium 0.1% Manganese 0.1% Sulfur 0.1... moon.

See also

• A list of Iranian (Persian) scientists: Khwarizmi Avicenna Omar Khayyam Farabi Shaykh Bahai Razi Samarqandi Mahani Qazwini Karaji Farsi Al-Kindi Biruni Kushyar ibn Labban Qadi Zada Alhazen Kashi Ulugh Beg Nayrizi Abu al-Wafa Ibn Miskawayh Quhi Abu Sahl Kuhi Sharaf Tusi Ahmad Banu Musa Khujandi Nasireddin Tusi Hasan... List of Iranian scientists

External link

• His Biography on St. Andrew's School of Mathematics, Scotland (http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Abu'l-Wafa.html)