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The correct formulas for complex trigonometry require cos(z) = (exp(iz) + exp(-iz)) / 2 sin(z) = (exp(iz) - exp(-iz)) / (2i)
The correct formulas for complex trigonometry require cos(z) = (exp(iz) + exp(-iz)) / 2 sin(z) = (exp(iz) - exp(-iz)) / (2i)