The tangents to the parabola `x = y^2 + c` from origin are perpendicular then `c` is equal to

If three normals are drawn from the point (c, 0) to the parabola y^(2)=4x and two of which are perpendicular, then the value of c is equal to

If three normals are drawn from the point (c, 0) to the parabola y^(2)=4x and two of which are perpendicular, then the value of c is equal to

The point on the line x-y+ 2= 0 from which the tangent to the parabola y^2= 8x is perpendicular to the given line is (a, b) , then the line ax + by+c=0 is

Find the equation of the tangent of the parabola y^(2) = 8x which is perpendicular to the line 2x+ y+1 = 0

The point on the line x-y+2=0 from which the tangent to the parabola y^(2)=8x is perpendicular to the given labe is (a,b), then the line ax+by+c=0 is

From vertex O ofthe parabola y^(2)=4ax perpendicular is drawn at a tangent to the parabola.If it meets the tangent and the parabola at point P and Q respectively then OP.OQ is equal to (A) constant (B) 1(C) -1(D) 2