Indian Mathematicians BRAHMAGUPTA

Brahmagupta

• Brahma Gupta was born in 598A.D in Pakistan.
• He gave four methods of multiplication.

• He gave the following formula, used in G.P series

a + ar + ar² + ar³ +……….. + ar^n-1 = (ar^n-1) ÷ (r – 1)

• He gave the following formulae :

Area of a cyclic quadrilateral with side a, b, c, d= √(s -a)(s- b)(s -c)(s- d) where 2s = a + b + c + d Length of its diagonals =