a)Write a brief summary ofAl-Kashicontributions in Algebra and Trigonometry.(2 lines) a)Write a brief summary ofAl-Kashicontributions in Algebra and Trigonometry.(2 lines) a)Write a brief summary ofAl-Kashicontributions in Algebra and Trigonometry.(2 lines) Solution al-Kashi was the first to provide an explicit statement of the law of cosines in a form suitable for triangulation. In 1424 CE al-Kashi finished his most famous work, the Risala al-muhitiyya (Treatise on the Circumference). In it he calculated pi, (the ratio of a circle.