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Question Number 107976 by anonymous last updated on 13/Aug/20

$$Rewrite\cos 6x\cos 4xasasumor$$$$difference$$

Answered by mathmax by abdo last updated on 13/Aug/20

$$\cos \left(4\mathrm{x}\right)\cos \left(6\mathrm{x}\right)=\frac{1}{2}\{\cos \left(10\mathrm{x}\right)+\cos \left(2\mathrm{x}\right)\}$$

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