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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class11  >>  3-D Geometry
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Q)

The direction cosine of a line which is ⊥ to two perpendicular lines whose direction cosines are (l1,m1,n1)and(l2,m2,n2) is ?

(a)(m1n2−m2n1,n1l2−n2l1,l1,m2−m1l2)(b)(l1+l2,m1+m2,n1+n2)(c)(l1+l2,m1+m2,n1+n2)(d)Noneofthese.

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