The Total solution for NCERT class 6-12
We need to prove:
Let us assume A (x1,y1) and B (x2, y2) be the given points and Obe the origin.
Slope of OA = m1 =y1×1
Slope of OB = m2 =y2×2
It is giventhat θ is the angle between lines OA and OB.
Hence proved.
