1.

vec(a)=2hati-hatj+hatk,vec(b)=hati+2hatj-hatk,vec( c )=hati+hatj-2hatk. The vector vec( r ) is coplanner with vector vec(b) and vec( c ). If the magnitude of the projection vec( r ) on vec(a) is sqrt((2)/(3)) then vec( r ) = …………..

Answer»

`2hati+3hatj-3hatk`
`-2hati-hatj+5hatk`
`2hati+3hatj+3hatk`
`2hati+hatj+5hatk`

ANSWER :B


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