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integrate 3cot(x)ln(sin(x)) dx. Sugestão: escreva cot(x) = cos(x)/sin(x) and faça u = ln(sin(x))
integrate 3cot(x)ln(sin(x)) dx. Sugestão: escreva cot(x) = cos(x)/sin(x) and faça u = ln(sin(x))
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