Kushyar Gilani
Persian mathematician, geographer, and astronomer
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(Suggest an Edit or Addition)According to Wikipedia, Abul-Hasan Kūshyār ibn Labbān ibn Bashahri Daylami , also known as Kūshyār Daylami , was an Iranian mathematician, geographer, and astronomer from Daylam, south of the Caspian Sea, Iran. Career Kūshyār Daylami's main work was probably done about the beginning of the 11th century, and seems to have taken an important part in the elaboration of trigonometry. He continued the investigations of the 10th century mathematician and astronomer Abul Wáfa, and devoted much space to this in his , which incorporated the improved values of the planetary apogees observed by al-Battani. The tables were translated into the Persian language before the end of the century. He wrote also an astrological introduction and an arithmetic treatise .
