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प्रश्न
If `vec a=7hati+hatj-4hatk and vecb=2hati+6hatj+3hatk` , then find the projection of `vec a and vecb`
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उत्तर
`vec a=7hati+hatj-4hatk`
` vecb=2hati+6hatj+3hatk,`
The projection of ` veca ` and `vecb`is given by
`1/|b'|(veca.vecb)=((7xx2)+(1xx6)+(-4xx3))/(sqrt(2^2+6^2+3^2))=8/7`
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