If `y= 3x+c` is a tangent to the circle `x^2+y^2-2x-4y-5=0` , then `c` is equal to :

If y=c is a tangent to the circle x^(2)+y^(2)-2x-2y-2=0, then the value of c can be

If y=c is a tangent to the circle x^(2)+y^(2)–2x+2y–2 =0 at (1, 1), then the value of c is

if the line y=2x+c be a tangent to the ellipse (x^(2))/(8)+(y^(2))/(4)=1, then c is equal to

if theta the angle between the tangents from (-1,0) to the circle x^(2)+y^(2)-5x+4y-2=0, then theta is equal to

If the tangent to the ellipse x^(2)+4y^(2)=16 at the point 0 sanormal to the circle x^(2)+y^(2)-8x-4y=0 then theta is equal to

If the circle x^(2)+y^(2)+4x+22y+c=0 bisects the circumference of the circle x^(2)+y^(2)-2x+8y-d=0, then (c+d) is equal to

The equation of the tangent to the circle x^(2)+y^(2)-2x-4y-4=0 which is perpendicular to 3x-4y-1=0 is