A History of the Kerala School of Hindu Astronomy (in Perspective) c8.s6.43

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c8.s6.43

Elsewhere, Mādhava gives a series for π, different from that of Leibnitz. Thus, in continuation of the formula for the inverse tangent given in the lines iṣṭajyātrījyayor ghātāt etc. (see above, p. 20), he mentions the measure of the circumference when the arc calculated is half of circumference, thus :

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