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Please prove the following two expressions: (1) In the Cartesian coordinate system, prove a a A x B= A1 A2 A3 B B B3

Please prove the following two expressions: (1) In the Cartesian coordinate system, prove a a A x B= A1 A2 A3 B B B3 (2) In the cylindrical coordinate system, prove Ax A, cos o = sin o 0 -sino cos o 0 0 A, 0 A

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