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A and B are two mutually perpendicular vectors. Calculate (a) A . B and (b) A × B.

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A and B are two mutually perpendicular vectors. Calculate (a) A . B and (b) A × B.

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(a) A . B = |A| |B| cosθ = 0 when θ = 90º

(b) A × B = |A| |B| sin θ = |A| |B| as sin θ = 1 at θ = 90º 

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