∫¹∫2 (cotx + sinx)dx
∫12(cotx+sinx)dx=(lnsinx−cosx)\int_{1}^{2}(cotx+sinx)dx=(\ln sinx-cosx)∫12(cotx+sinx)dx=(lnsinx−cosx)∣12=lnsin2−lnsin1−cos2+cos1≈1.03|_1^2=\ln sin2-\ln sin1-cos2+cos1\approx1.03∣12=lnsin2−lnsin1−cos2+cos1≈1.03
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