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in Physics by (44.7k points)
`hati, hatj` तथा `hatk` क्रमशः `X-, Y-`तथा Z-अक्षों के अनुदिश एकांक सदिश है | निम्नलिखित में कौन-सा कथन सही नहीं है ?
A. `hati * hatj =1`
B. `hatj xx hati = -hatk`
C. `hati * hatj = 0`
D. `hatj xx hatk = 0`

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