If \( \lim _{x \rightarrow 0} \frac{a e^{x}-b \cos x+c e^{-x}}{x \s...

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If \( \lim _{x \rightarrow 0} \frac{a e^{x}-b \cos x+c e^{-x}}{x \sin x}=2 \) then \( a+b+c \) is equal to
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