\(\dfrac {\cos^3 x - \cos 3x}{\cos x} + \dfrac {\sin^3 x - \sin 3x}{\sin x} = \dotso\)
(A) \(-3\)
(B) \(-1\)
(C) \(0\)
(D) \(1\)
(E) \(3\)
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\(\dfrac {\cos^3 x - \cos 3x}{\cos x} + \dfrac {\sin^3 x - \sin 3x}{\sin x} = \dotso\)
(A) \(-3\)
(B) \(-1\)
(C) \(0\)
(D) \(1\)
(E) \(3\)