1. Slope or Gradient of a line :
2. Slope of a line terms of co – ordinates of any two points.
3. Slope of a line when its equation.
4. Angle between two lines.
(i). Condition for parallel :
(ii). Condition for perpendicular.
5. Equation & Length of tangent and Normal :
(i). Equation of tangent :
(ii). Equation of normal :
(iii). Length of tangent :
(iv). Length of Subtagent.
(v). Length of normal.
(vi). Length of Subnormal.
6. Some facts about the tangent.
7. Some facts about the normal.
8. Orthogonal Curves.
9. Point of inflexion.
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