Mathematics, 03.11.2021 01:00 KillerMDFK7992

Write the expression as the sine, cosine, or tangent of an angle. cos 9x cos 6x - sin 9x sin 6x

O cos 3x
O sin 15x
O cos 15x
O sin 3x

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Write the expression as the sine, cosine, or tangent of an angle. cos 9x cos 6x - sin 9x sin 6x