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Prove that the volume of tetrahedron ...

Prove that the volume of tetrahedron bounded by the planes ` vec rdot(m hat j+n hat k)=0, vec rdot(n hat k+l hat i)=0, vec rdot(l hat i+m hat j)=0, vec rdot(l hat i+m hat j+n hat k)=pi s(2p^3)/(3l m n)`

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Find the angle between the lines vec r= dot( hat i+2 hat j- hat k)+lambda( hat i- hat j+ hat k) and the plane vec r . dot(3 hat i- hat j+ hat k)=4.

Find the equation the plane which contain the line of intersection of the planes vec rdot( hat i+2 hat j+3 hat k)-4=0a n d vec rdot(2 hat i+ hat j- hat k)+5=0 and which is perpendicular to the plane vec r(5 hat i+3 hat j-6 hat k)+8=0 .

The distance between the line vec r=(2 hat i-2 hat j+3 hat k)+lambda( hat i- hat j+4 hat k) and plane vec rdot(( hat i+5 hat j+ hat k))=5.

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

Find vec axx vec b ,\ if\ vec a=2 hat i+ hat k\ a n d\ vec b= hat i+ hat j+ hat kdot

A unit vector parallel to the intersection of the planes vec r. \ ( hat i- hat j+ hat k)=5 \ a n d \ vec r. \ (2 hat i+ hat j-3 hat k)=4 a. (2 hat i+5 hat j-3 hat k)/(sqrt(38)) b. (-2 hat i+5 hat j-3 hat k)/(sqrt(38)) c. (2 hat i+5 hat j-3 hat k)/(sqrt(38)) d. (-2 hat i-5 hat j-3 hat k)/(sqrt(38))

Let vec aa n d vec b be mutually perpendicular unit vectors. Then for any arbitrary vec r , a. vec r=( vec rdot hat a) hat a+( vec rdot hat b) hat b+( vec rdot( hat axx hat b))( hat axx hat b) b. vec r=( vec rdot hat a)-( vec rdot hat b) hat b-( vec rdot( hat axx hat b))( hat axx hat b) c. vec r=( vec rdot hat a) hat a-( vec rdot hat b) hat b+( vec rdot( hat axx hat b))( hat axx hat b) none of these

Prove that ( vec a.hat i)( vec axx hat i)+( vec a.j)( vec axx hat j)+( vec a. hat k)( vec axx hat k)=0.

Find vec adot vec b when: vec a= hat j- hat k\ a n d\ vec b=2 hat i+3 hat j-2 hat k

Let vec a= hat i+2 hat j+ hat k , vec b= hat i- hat j+ hat ka n d vec c= hat i+ hat j- hat kdot Then find [vec a vec b vec c]

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