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If vec r. hat i= vec r.hat j= vec r.hat...

If ` vec r. hat i= vec r.hat j= vec r.hat ka n d| vec r|=3,` then find the vector ` vec rdot`

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If vec a.hat i= vec a.( hat i+ hat j)= vec a.( hat i+ hat j+ hat k) , then find the unit vector vec a

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  14. Show that ( vec a- vec b)xx( vec a+ vec b)=2( vec axx vec b)dot

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  15. Let vec a= hat i+4 hat j+2 hat k , vec b=3 hat i-2 hat j+7 hat ka n d...

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