death_place death_date influenced birth_place influences field birth_date known_for article_title name
ghazni 1036 al-biruni gīlān menelaus of alexandria , abu al-wafa ' astronomer mathematician 970 trigonometry law of sines abu nasr mansur
 abu nasr mansur
abu nasr mansur

abu nasr mansur ibn ali ibn iraq -lrb- ; c. 960 -- 1036 -rrb- was a persian muslim mathematician .
he is well known for his work with the spherical sine law .
abu nasr mansur was born in gilan , persia , to the ruling family of khwarezm , the afrighids .
he was thus a prince within the political sphere .
he was a student of abu ` l-wafa and a teacher of and also an important colleague of the mathematician , al-biruni .
together , they were responsible for great discoveries in mathematics and dedicated many works to one another .
most of abu nasr 's work focused on math , but some of his writings were on astronomy .
in mathematics , he had many important writings on trigonometry , which were developed from the writings of ptolemy .
he also preserved the writings of menelaus of alexandria and reworked many of the greeks theorems .
he died in the ghaznavid empire -lrb- modern-day afghanistan -rrb- near the city of ghazna .
