$[-/3$ Points$]$

Show that the given functions are orthogonal on the indicated interval.

$f_1(x)=e^x,f_2(x)=sin(x)$;$[\frac{}{4},5\frac{}{4}]$

${\displaystyle \underset{\frac{}{4}}{\overset{5\frac{}{4}}{}}}{f}_1(x)f_2(x)dx={\displaystyle \underset{\frac{}{4}}{\overset{5\frac{}{4}}{}}}{e}^x()dx,($ give integrand $in$ terms $ofx)$

$=(){|}_{\frac{}{4}}^{5\frac{}{4}}|$

$=$

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