If alpha is a repeated root of the quadratic equation (a - D) x2 + ax + (a + D) = 0 then d^2/a^2 has the value equal to (A) sin^2 90°(B) cos^2 60°(C) sin^2 45°(D) cos^2 30°?
If alpha is a repeated root of the quadratic equation (a - D) x2 + ax + (a + D) = 0 then d^2/a^2 has the value equal to (A) sin^2 90°(B) cos^2 60°(C) sin^2 45°(D) cos^2 30°?