If from any point on the circle x2+y2+2gx+2fy+c=0 tangents are drawn to the circle x2+y2+2gx+2fy+csin2α+(g2+f2)cos2α=0,show that the angle between the tangents is equal to 2α.
If from any point on the circle x2+y2+2gx+2fy+c=0 tangents are drawn to the circle x2+y2+2gx+2fy+csin2α+(g2+f2)cos2α=0,show that the angle between the tangents is equal to 2α.