If 0 is the angle between two lines whose d.c.s are 1. m. n and 12....

 

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If 0 is the angle between two lines whose d.c.s are 1₁. m₁. n₁ and 12. m2. n2, then the d.cs of one of the angular bisectors of the two lines are A B C D 11+12 m+m₂ n1 + 12 2 2 2 11 + 12 m₁m₂ n1 + n₂ 0 0 2 cos() 2 cos() 2 cos(-) 1₁+12 m₁m2 n₁ +₂ 0 +2 cos() cos() cos( DIN 11+12 m₁m₂ nj+n2 0 2 sin() 2 sin() 2 sin() If 0 is the angle between two lines whose d.c.s are 1₁. m₁. n₁ and 12. m2. n2, then the d.cs of one of the angular bisectors of the two lines are A B C D 11+12 m+m₂ n1 + 12 2 2 2 11 + 12 m₁m₂ n1 + n₂ 0 0 2 cos() 2 cos() 2 cos(-) 1₁+12 m₁m2 n₁ +₂ 0 +2 cos() cos() cos( DIN 11+12 m₁m₂ nj+n2 0 2 sin() 2 sin() 2 sin()

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If 1 1 1 m m n n cos 0 The direction ratios of the internal angle bisector are l ... View the full answer