atgailos Susipažinimas nuodai arctan 1 in terms of pi Patvirtinimas Prisigerti Sway
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Dave Richeson on X: "Euler proved that π/4=arctan(1/2)+arctan(1/3), which can be used for computing digits of π (using the arctangent series). I wondered if I could prove it without using a trig
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