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`int_(0)^(pi//2)(sqrt(tanx)+sqrt(cotx)) dx` |
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Answer» `I=int_(0)^(pi//2)(sqrt(2)(sinx+cosx))/(sqrt(2sinxcosx))dx=sqrt(2)*int_(0)^(pi//2)((sinx+cosx))/(sqrt(1-(1-sin2x)))dx` `=sqrt(2)*int_(0)^(pi//2)((sinx+cosx))/(sqrt(1-(sinx-cosx)^(2)))dx`. Put `(sinx-cosx)=t`. |
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