[" 16.If "hat imath,hat jmath,hat k" are...

[" 16.If "hat imath,hat jmath,hat k" are unit vectors,then "],[[" a) "hat imath.hat jmath=1," b) "hat imath.hat imath=1," c) "hat imath timeshat jmath=1," d) "hat imath times(hat jmath times widehat k)=1]]

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