Solved: Use the rotation formulas (5) to show that
Chapter 10, Problem 57(choose chapter or problem)
Use the rotation formulas (5) to show that distance is invariant under a rotation of axes. That is, show that the distance from P1 = 1x1 , y12 to P2 = 1x2 , y22 in the xy-plane equals the distance from P1 = 1x= 1 , y= 12 to P2 = 1x= 2 , y= 22 in the x y@plane
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