Verify the Identity $4 \cos 3 x \cos 6 x \sin 9 x = \sin 3 x + \sin 14 x + \sin 19 x$

question 18

Multiple Choice

Verify the identity. $4 \cos 3 x \cos 6 x \sin 9 x = \sin 3 x + \sin 14 x + \sin 19 x$

• A) Not identical
• B) Identical

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