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Evaluate: lim (x→0) ((cos 7x – cos 9x)/(cos 3x – cos5x))

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Evaluate: lim (x→0) ((cos 7x – cos 9x)/(cos 3x – cos5x))

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Limit = lim (x→0) ((cos 7x – cos 9x)/(cos 3x – cos5x))

lim (x→0) ((cos 7x – cos 9x)/(cos 3x – cos5x))

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