The Total solution for NCERT class 6-12
A straight line drawn through the point A (2, 1) making anangle π/4 with positive x–axis intersects another line x + 2y + 1 = 0in the point B. Find length AB.
Given:
(x1, y1)= A (2, 1), θ = π/4 = 45°
Let us find the lengthAB.
By using the formula,
The equation of theline is given by:
x – y – 1 = 0
Let AB = r
Then, the coordinateof B is given by