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(cos2x+1)(2cosx-1)(2cosx-1)(2cos2x-1)=2cos8x
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(cos2x+1)(2cosx-1)(2cosx-1)(2cos2x-1)=2cos8x

User TomKPZ
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cosdfhbjazkljndAnswer:

Step-sdfasfsdbfsdfsyd

-step explanation:

User Randmin
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