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Peer reviewedCastellanos, Dario – Mathematics Magazine, 1988
Some appearances of pi in a wide variety of problems are presented. Sections focus on some history, the first analytical expressions for pi, Euler's summation formula, Euler and Bernoulli, approximations to pi, two and three series for the arctangent, more analytical expressions for pi, and arctangent formulas for calculating pi. (MNS)
Descriptors: Algebra, Calculus, College Mathematics, Geometric Concepts
