If a^{\to},b^{\to},c^{\to} and d^{\to} are unit vectors such that (a^{\to}\timesb^{\to}).(c^{\to}\timesd^{\to}) = 1 and a^{\to}.c^{\to} = 1/2 , then [JEE Adv 2009 P1]

Correct Answer is : →b,→d are non-parallel.

a^{\to},b^{\to},c^{\to} are non-coplanar.

b^{\to},c^{\to},d^{\to} are non-coplanar.

b^{\to},d^{\to} are non-parallel.

a^{\to},d^{\to} are parallel and b^{\to},c^{\to} are parallel.

IIT JEE Advanced 2009 Paper 1

Section: Mathematics

Question : 42 of 60

Marks: +1, -0

→

and

→

are unit vectors such that (

→

).(

→

) = 1 and

→

, then

[JEE Adv 2009 P1]

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