JEE Advanced Mathematics question
The equation of the plane bisecting the angle between the planes and that contains the origin, is
Answer: (B)
Solution
Write both planes with positive constant terms: (norm 5) and (norm 7). With equal-sign constants, the bisector containing the origin is
=+\ ⇒\ -21x-28y+28=30x-10y+15z+25\ ⇒\ 51x+18y+15z=3.
The other bisector is . Neithe
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