If |bar(a).bar(b)|=3 and |bar(a)xx bar(b...

If `|bar(a).bar(b)|=3` and `|bar(a)xx bar(b)|=4` then the angle between `bar(a)` and `bar(b)` is ………………

`cos^(-1)""(3)/(4)`

`cos^(-1)""(3)/(5)`

`cos^(-1)""(4)/(5)`

`(pi)/(4)`

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bar(a)=a_(1)hati+a_(2)hatj+a_(3)hatk,bar(b)=b_(1)hati+b_(2)hatj+b_(3)hatk,bar( c )=c_(1)hati+c_(2)hatj+c_(3)hatk are three non zero vectors. The unit vector bar( c ) is perpendicular to bar(a) and bar(b) . The angle between bar(a) and bar(b) is (pi)/(6) then, |{:(a_(1),b_(1),c_(1)),(a_(2),b_(2),c_(2)),(a_(3),b_(3),c_(3)):}| = .............

KUMAR PRAKASHAN-VECTOR ALGEBRA -Solutions of NCERT Exemplar Problems (Multiple Choice Questions (MCQs) )

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bar( r )xx bar(a)=bar(b)xx bar(a),bar( r )xx bar(b)=bar(a)xx bar(b),ba...
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(bar(a)xx bar(b))^(2) = ……………..
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For a vector bar(a),bar(a)xx vec( r )=bar(j) then bar(a).bar( r ) = ……...
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If bar(mu)=bar(a)-bar(b),bar(v)=bar(a)+bar(b),|bar(a)|=|bar(b)|=2 then...
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In a parallelogram ABCD, vec(AB)=hati+hatj+hatk and diagonal vec(AC)=h...
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The points A(vec(a)),B(vec(b)) and C(vec( c )) are collinear then …………...
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