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Show that d/dx(2cos^2 x),d/dx(-2sin^2 x) and d/dc cos 2x are all the same .explain why? Plz answer as soon as possible?

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  • Show that d/dx(2cos^2 x),d/dx(-2sin^2 x) and d/dc cos 2x are all the same .explain why? Plz answer as soon as possible?


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