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NDA2013MathematicsThree Dimensional GeometryActual

What is the angle between the planes 2 x-y-2 z+1=0 and 3 x-4 y+5 z-3=0 ?

Options

  1. A6
  2. B4
  3. C3
  4. D2

Correct answer

D. 2

Step-by-step solution

aligned & = 2(3)+(-1)(-4)+5(-2) 2^2+1^2+2^2 3^2+4^2+5^2 =0 & = 2 aligned

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