The equation of the plane bisecting the acute angle between the planes 2x – y + 2z + 3 = 0 and 3x – 2y + 6z + 8 = 0 is
Answer & explanation
Correct answer: option 1
a1a1 + b1b2 + c1c2 = 6 + 2 + 12 is positive
so that the acute angle bisector is $\frac{2x-y+2z+3}{3}=-\frac{3x-2y+6z+8}{7}$
⇒ 23x - 13y + 32z + 45 = 0.
Hence (A) is the correct answer.