1.

The unit vectors vec(a),vec(b) and vec( c ) are not coplanar. If vec(a)xx(vec(b)xx vec( c ))=(1)/(sqrt(2))(b+c) then the angle between vec(a) and vec(b) is ………………

Answer»

`(3PI)/(4)`
`(PI)/(4)`
`(pi)/(2)`
`pi`

ANSWER :A


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