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Double Angle Identities

12. Trigonometric Identities / Double Angle Identities / Problem 4

Problem 4

Write the given trigonometric difference as a product.
sin 15x - sin 7x

A

2sin 4x cos 22x

B

2sin 4x cos 11x

C

2sin 4x sin 11x

D

2cos 4x cos 11x