Ifintxe^xcosx dx=a e^x(b(1-x)sinx+c xcos...

`Ifintxe^xcosx dx=a e^x(b(1-x)sinx+c xcosx)+d ,t h e n` (a) `a=1,b=1,c=-1` (b) `a=1/2,b=-,c=1` (c) `a=1,b=-1,c=1` (d) `a=1/2, b=1,c=-1`

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