Consider a line AB makes an angle with the positive direction of x – axis and a point on the line is .
Let a general point P on the line AB and the distance between P and Q is r.
Draw a line QL, PM perpendicular to x-axis and draw.
In a right angled triangle PQN,
Therefore, the equation of a straight line in parametric form is:
Determine the equation of a line passes through the point (–1, – 2) and makes an angle of 30o with the positive direction of x-axis, in parametric form. Find the coordinates of a point at distance of 2 units.
The equation of the line is:
The coordinates of the point are.