Question
The anti-derivative of $\frac{\cos 5 x+\cos 4 x}{1-2 \cos 3 x}$ is(A) $\frac{\sin 2 x}{2}+\cos x+c$(B) $-\frac{\sin 2 x}{2}+\sin x+c$(C) $-\frac{\sin 2 x}{2}-\sin x+c$(D) $\frac{\sin 2 x}{2}-\cos x+c$
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Step 1: We are given the function $\frac{\cos 5 x+\cos 4 x}{1-2 \cos 3 x}$ and we need to find its anti-derivative. Show more…
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