"Madhava series" . . "Madhava's sine series" . "Madhava's cosine series" . . "Madhava" . . "Madhava\u2013Leibniz series" . . . "power series expansions" . . . "power series" . . "Madhava series#Madhava's arctangent series" . "Madhava series" . "madhava series" . . . .