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Questions  >>  Archives  >>  JEEMAIN-2016
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In a triangle ABC, right angled at the vertex A, if the position vectors of A, B and C are respectively 3ˆi+ˆjˆk,ˆi+3ˆj+pˆk and 5ˆi+qˆj4ˆk then the point (p,q) lies on a line :

 (1) parallel to x-axis. (2) parallel to y-axis.(3) making an acute angle with the positive direction of x-axis.(4) making an obtuse angle with the positive direction of x-axis. 

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