1.

`int_(pi//4)^(pi//2)cotxdx=?`A. `log2`B. `2log2`C. `(1)/(2)log2`D. none of these

Answer» `I=int_(pi//4)^(pi//2)cotxdx=[logsinx]_(pi//4)^(pi//2)=[log1-log"(1)/(sqrt(2))]=(1)/(2)log2`.


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