vecA .vecB ज्ञात कीजिए यदि vecA = 3hati ...

`vecA .vecB` ज्ञात कीजिए यदि `vecA = 3hati +4hatj+2hatk` तथा `vecB =2hati +3hatj - hatk` है।

लिखित उत्तर

Verified by Experts

`vecA. vecB = (3hati + 4hatj + 2hatk) . (2hati + 3hatj - hatk)`
`6 + 12 + 2 = 16`

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