यदि `vecA = hati - hatj + 2hatk` तथा `vecB = 3hati + 2hatj - hatk` हो, तो `vecA xx vecB` की गड़ना कीजिए|

Explanation

दिया है- `vecA = hati - hatj + 2hatk` तथा `vecB = 3hati + 2hatj - hatk`
अतः `vecA xx vecB = |{:(hati, hatj, hatk),(1,-1,2),(3,2,-1):}|`
`=(-1 xx -1 -2 xx 2)hati + (3 xx 2 -1 xx -1)hatj + (1 xx 2 -3 x -1)hatk`
`=3hati + 7hatj + 5hatk`