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If vecA=2veci+3vecj+4veck and vecB=4veci...

If `vecA=2veci+3vecj+4veck and vecB=4veci+3vecj+2veck`, find angle between them.

Text Solution

Verified by Experts

The correct Answer is:
`-6hati+12hatj-6hatk`
`vecA=2hati+3hatj+4hatk
vecB=4hati+3hatj+2hatk, vecAxxvecB=|(hati, hatj, hatk),(2,3,4),(4,3,2)|
hati(6-12)-hatj(4-16)+hatk(6-12)
=-6hati+12hatj-6hatk`.
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