Calculus and Vectors - Lines and Planes

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SUMMARY

The discussion focuses on the mathematical relationship between two perpendicular planes defined by the equations A1x + B1y + C1z + D1 = 0 and A2x + B2y + C2z + D2 = 0. It is established that the expression A1A2 + B1B2 + C1C2 represents the dot product of the normals to these planes. Since the planes are perpendicular, this dot product equals zero, confirming the solution provided by the participant.

PREREQUISITES
  • Understanding of vector mathematics and dot products
  • Familiarity with the equations of planes in three-dimensional space
  • Knowledge of the geometric interpretation of perpendicularity in vector spaces
  • Basic skills in solving algebraic equations
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  • Study the properties of dot products in vector algebra
  • Explore the geometric interpretation of planes and their normals
  • Learn about the implications of perpendicular vectors in three-dimensional geometry
  • Investigate applications of plane equations in physics and engineering
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Students of mathematics, particularly those studying calculus and vector geometry, as well as educators and professionals involved in physics and engineering applications of vector analysis.

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Homework Statement
The planes A1x + B1y + C1z + D1 = 0 and A2x + B2y + C2z + D2 = 0 are perpendicular. Find the value of A1A2 + B1B2 + C1C2.

I solved it, can someone confirm? Thanks!
Relevant Equations
n/a
IMG_3634.jpg
 
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ttpp1124 said:
Homework Statement:: The planes A1x + B1y + C1z + D1 = 0 and A2x + B2y + C2z + D2 = 0 are perpendicular. Find the value of A1A2 + B1B2 + C1C2.

I solved it, can someone confirm? Thanks!
Relevant Equations:: n/a

View attachment 260145
Yes. Clearly ##A_1A_2 + B_1B_2 + C_1C_2## is the dot product of the two normals to the planes, so this expression will be zero.
 
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