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fState a trigonometric identity that is useful in evaluating | 4 sin 8x ax Choose the correct answer below A. sin 2x = 2 sin
\fState a trigonometric identity that is useful in evaluating | 4 sin 8x ax Choose the correct answer below A. sin 2x = 2 sin x cos x O B. sin x = cos X O C. sin 2x + cos x OD. sin -x = 1 - cos 2x 2
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