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1. |
Solve ∫ (cot (log x)/x) dx, x ∈ I ⊂ (0, ∞) \ {enπ : n ∈ Z). |
Answer» t = log x ⇒ dt = dx/x ∫ (cot (log x)/x) dx = ∫ cot t dt = log (sin t) + C = log (sin (log x)) + C |
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