The value of \( \int \frac{\cos 5 x+\cos 4 x}{1-2 \cos 3 x} \cdot d x \) (a) \( -\left(\frac{\si...

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The value of \( \int \frac{\cos 5 x+\cos 4 x}{1-2 \cos 3 x} \cdot d x \)
(a) \( -\left(\frac{\sin 2 x}{2}+\sin x\right)+C \)
(b) \( -\left(\frac{\sin 2 x}{3}+\sin x\right)+C \)
(c) \( -(\sin 2 x+\sin x)+C \)
(d) None of these
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