Let C be the conic section with equation 3x^2-2root3 xy +y^2 +16x + 16root3 y=0
Find a value of alpha such that the coefficient of Xy in the equation for C in X & Y coordinates=0
So what I did is this
tan2alpha= -2root3/3-1 which gives me alpha as -pi/6 which is wrong though :/