If \( \int_{0}^{x} \frac{b t \cos 4 t-a \sin 4 t}{t^{2}} d t=\frac{...

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If \( \int_{0}^{x} \frac{b t \cos 4 t-a \sin 4 t}{t^{2}} d t=\frac{a \sin 4 x}{x} \) for all \( x \neq 0 \), then \( a \) and \( b \) are given by
\( \mathrm{P} \)
W
(a) \( a=\frac{1}{4}, b=1 \)
(b) \( a=2, b=2 \)
(c) \( a=-1 b=4 \)
(d) \( a=2 b=4 \)
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