已知sin(45度-α)=-2/3,π/4

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已知sin(45度-α)=-2/3,π/4已知sin(45度-α)=-2/3,π/4已知sin(45度-α)=-2/3,π/4π/4

已知sin(45度-α)=-2/3,π/4
已知sin(45度-α)=-2/3,π/4

已知sin(45度-α)=-2/3,π/4
π/4