[" 49.The resultant of "vec A" and "vec ...

[" 49.The resultant of "vec A" and "vec B" is perpendicular to "vec B" ."],[" What is the angle between "vec A" and "vec B?],[[(1)cos^(-1)((A)/(B)),(2)cos^(-1)(-(B)/(A))],[," (3) "sin^(-1)((A)/(B))]]

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