化简:(2cos²α-1)/[2tan((π/4)- α)]*{cos³[(π/4)- α],

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化简:(2cos²α-1)/[2tan((π/4)- α)]*{cos³[(π/4)- α],
化简:(2cos²α-1)/[2tan((π/4)- α)]*{cos³[(π/4)- α],

化简:(2cos²α-1)/[2tan((π/4)- α)]*{cos³[(π/4)- α],