Lesson#14 <br />What is Normal ? Normal form of equation of straight line ] <br />What is Normal? <br />A perpendicular drawn from a point to a curve is called normal. <br />CASE 5: If length of normal from origin to line and the angle "theta" (measured counterclockwise) between that normal and positive x-axis are given, we will use: <br />Normal Form: x cos theta + y sin theta = p <br />Math.Ex4.3 Part 14 <br />Normal Form of Equation of a Straight Line <br />Theorem: Equation of a straight line, such that length of normal from origin to line is P and theta is the angle (measured counterclockwise) between normal and positive x-axis. <br />CASE 6: If inclination "a" and a point Q(x1 , y1) of a line are given. <br />We will use symmetric Form or Parametric Form. <br />Example: Write parametric equation of a straight line whose inclination is 45ُ and passing through (2 , 5). <br />Introduction to Analytical Geometry <br />Chapter No 4 <br />Exercise No 4.3 <br />Mathematics <br />part 2
