In equilateral triangle ABC ,D is a point on side BC such that BD = 1/3 BC .prove that 9AD^2 =7AB^2.

In equilateral triangle ABC ,D is a point on side BC such that BD = 1/

1.	In equilateral triangle ABC ,D is a point on side BC such that BD = 1/3 BC .prove that 9AD^2 =7AB^2.
Answer» It is a book sum.search ncert solutions and find answers.