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Ifinta^b|sinx|dx=8a n dint0^(a+b)|cosx|d...

`Ifint_a^b|sinx|dx=8a n dint_0^(a+b)|cosx|dx=9,t h e n`
(a) `a+b=(9pi)/2`
(b) `|a-b|=4pi`
(c)`a/b=15`
(d) `int_a^bsec^2x dx=0`

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