What is the angle between the straight lines (m^2-mn)y=(mn+n^2)x+n^3 and (mn+m^2)y=(mn-n^2)x+m^3, where m>n?

NDA 2018 Mathematics question

What is the angle between the straight lines and , where ?

Answer: (B)

Slopes: and , so and $- =

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-028863