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Sahithyan's S2
Sahithyan's S2 — Methods of Mathematics

Normal Line

Let . Normal line at point , is the line passing through and perpendicular to the tangent plane. The equation of the normal line is:

To a surface level

Let

  • is a 3-variable function
  • is the level surface of at
  • be a point on

Normal line to the surface at point , is the line passing through and perpendicular to the tangent plane. The equation of the normal line is: