The cosine of the angle between the line...

The cosine of the angle between the lines `barr=(3bari+2barj-4bark+t(bari+2barj+2bark), barr=(5bari-2bark)+bars(3bari+2barj+6bark)` is

`19/13`

`19/17`

`19/21`

`19/27`

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Observe the following, choose correct answer : Assertion(A): The lines barr =(2bari + barj)+s(bari + barj -bark) and barr =(bari +bark)+t(7bari - barj +bark) are coplanar. Reason (R) : Condition for the lines barr = bara + sbarb and barr = barc + tbard to be coplanar is [bara-barc barb -bard]=0

AAKASH SERIES-DOT PRODUCT OF TWO VECTORS-PRACTICE EXERCISE

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Vector equation of the plane through the origin and perpendicular to ...
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Equation of the plane passing through the point (3,4,5) and parallel t...
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Vector equation of the plane to which the vector bari+barj " normal, a...
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The perpendicular distance from origin to the plane barr.(2bari+3barj+...
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The cartesian equation of the plane passing through (3,4,-11) and para...
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The cosine of the angle between the lines barr=(3bari+2barj-4bark+t(ba...
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The work done by the force barF = 2bari-3barj-2bark in moving a partic...
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If forces of magnitude 6 and 7 units acting in the direction bari-2bar...
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The work done by the force barF = abari+barj+bark in moving a particle...
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The value of a, for which the points A,B,C with position vectors 2bari...
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The nonzero vectors bara,barb and barc " are related by " bara=8barb a...
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Let baru,barv,barw " be such that " absbaru =1, absbarv=2, absbarw=3 "...
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