SOLUTION: Cos4x-cos4y=8(cosx-cosy)(cosx+cosy)(cosx-siny)(cosx+cosy)

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Question 984124: Cos4x-cos4y=8(cosx-cosy)(cosx+cosy)(cosx-siny)(cosx+cosy)
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Thx for letting us know.