समीकरण \(\frac{3 \cos 2 x+\cos ^3 2 x}{\cos ^6 x-\sin ^6 x}\) = x3 - x2 + 6 के x ∈ ℝ के वास्तविक हलों का योगफल है:

1
0
2
1
3
-1
4
3

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