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If a unit vector hat a in the plane of ...

If a unit vector ` hat a` in the plane of ` vec b=2 hato+ hat j& vec c= hat i- hat j+ hat k` is such that ` vec a vec d` where ` vec d= hat j+2 hat l` , then ` hat a` is `( hat i+ hat j+ hat k)/(sqrt(3))` (b) `( hat i- hat j+ hat k)/(sqrt(3))` `(2 hat i+ hat j)/(sqrt(5))` (d) `(2 hat i- hat j)/(sqrt(5))`

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Vector vec a in the plane of vec b=2 hat i+ hat ja n d vec c= hat i- hat j+ hat k is such that it is equally inclined to vec ba n d vec d where vec d= hat j+2 hat kdot The value of vec a is a. ( hat i+ hat j+ hat k)/(sqrt(2)) b. ( hat i- hat j+ hat k)/(sqrt(3)) c. (2 hat i+ hat j)/(sqrt(5)) d. (2 hat i+ hat j)/(sqrt(5))

Let vec a= hat i- hat j , vec b= hat j- hat ka n d vec c= hat k- hat i. If vec d is a unit vector such that vec a.vec d=0=[ vec b vec c vec d], then d equals a. +-( hat i+ hat j-2 hat k)/(sqrt(6)) b. +-( hat i+ hat j- hat k)/(sqrt(3)) c. +-( hat i+ hat j+ hat k)/(sqrt(3)) d. +- hat k

A unit vector parallel to the intersection of the planes vec rdot( hat i- hat j+ hat k)=5a n d vec rdot(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))

The unit vector perpendicular to vec A = 2 hat i + 3 hat j + hat k and vec B = hat i - hat j + hat k is

vec a = (hat i + hat j + hat k), vec a * vec b = 1 and vec a xxvec b = hat j-hat k. Then vec b is

If vec a= hat i+ hat j+ hat k , vec b=2 hat i- hat j+3 hat k a n d vec c= hat i-2 hat j+ hat k find a unit vector parallel to 2 vec a- vec b+3 vec cdot

vec a=(hat i+hat j+hat k),vec a*vec b=1 and vec a xxvec b=hat j-hat k, then hat b is hat i-hat j+hat k b.2hat j-hat k c.hat i d.2hat i

If vec a=hat i-hat j and vec b=-hat j+hat k find the projection of vec a on vec b

If vec P=hat i+hat j+2hat k and vec Q=3hat i-2hat j+hat k ,the unit vector perpendicular to both bar(P) and bar(Q) is (A) (hat i+hat j-hat k)/(sqrt(3)) (B) 5(hat i+hat j-hat k) (C) (1)/(sqrt(3))(hat i-hat j+hat k) (D) (1)/(25)(hat i+hat j-hat k)

If vec a= hat i+ hat j+ hat k , vec adot vec b=2 and vec ax vec b=2 hat i+ hat j-3 hat k , then vec a+ vec b=5 hat i-4 hat j+2 hat k (b) vec a+ vec b=3 hat i+2 vec k vec b=2 hat i- hat j+ hat k (d) vec b= hat i-2 hat j-3 hat k

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