\( \int e^{a x} \operatorname{cosbxdx} \) is equal to
\( \mathrm{P}... VIDEO
\( \int e^{a x} \operatorname{cosbxdx} \) is equal to
\( \mathrm{P} \)
(A) real part of \( \int e^{(a+b i) x} d x \)
W.
(B) imaginary part of \( \int e^{(a+b i) x} d x \)
(C) neither real nor Imaginary part of \( \int e^{(a+b i) x} d x \)
(D) none of these
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