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Mathematics, 25.03.2021 02:20 wwwvio7565

Help please, I have been stuck on this problem for a while. Write the expression as the sine or cosine of an angle. cos 3x cos x - sin 3x sin x​


Help please, I have been stuck on this problem for a while.

Write the expression as the sine or c

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Help please, I have been stuck on this problem for a while. Write the expression as the sine or cos...

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