Question
$$\frac{\cos x+2 \cos ^{2} x+\cos 3 x}{\cos x+2 \cos ^{2} x-1}>1$$
Step 1
Step 1: First, we move the 1 from the right hand side of the inequality to the left hand side to get: $$ \frac{\cos x+2 \cos ^{2} x+\cos 3 x}{\cos x+2 \cos ^{2} x-1}-1>0 $$ Show more…
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