251.Find a vector of magnitude 9 and which is perpendicular to both the vectors
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252.Find a vector of magnitude 19 and which is perpendicular to both the vectors
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253.Find a vector of magnitude 5 units, perpendicular to each of the vectors where and
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Short Answer Type
254.Find the sine of the angle between the vectors . Also find a unit vector perpendicular to both the vectors.
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255.Find the sine of the angle between the vectors
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256.
If are two vectors such that and find the angle between .
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257.
If
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258.
Find if
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Long Answer Type
259.Use vector method only to find the values of a and b if points (2, b, 3), (a, – 5, 1) and ( – 1, 11, 9) are collinear.
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Short Answer Type
260.Find the area of the parallelogram having two adjacent sides OA and OB where O is the origin and the position vectors of A and B are respectively and
Long Answer Type
Short Answer Type
. Also find a unit vector perpendicular to both the vectors. 
and 
where 
and 
are two vectors such that 
and 
find the angle between 
.
if 
