Questions in circle

Select	Question
	The length of tangent from the point (5, 1) to the circle ${{x}^{2}}+{{y}^{2}}+6x-4y-3=0$ , is
	The equation of the normal to the circle ${{x}^{2}}+{{y}^{2}}=9$ at the point $\left( \frac{1}{\sqrt{2}},\frac{1}{\sqrt{2}} \right)$ is
	The equations of tangents to the circle ${{x}^{2}}+{{y}^{2}}-22x-4y+25=0$ which are perpendicular to the line $5x+12y+8=0$ are
	The line $x\cos \alpha +y\sin \alpha =p$ will be a tangent to the circle ${{x}^{2}}+{{y}^{2}}-2ax\cos \alpha -2ay\sin \alpha =0$ , if $p=$
	If the line $lx+my+n=0$ be a tangent to the circle ${{(x-h)}^{2}}+{{(y-k)}^{2}}={{a}^{2}},$ then
	The line $(x-a)\cos \alpha +(y-b)$ $\sin \alpha =r$ will be a tangent to the circle ${{(x-a)}^{2}}+{{(y-b)}^{2}}={{r}^{2}}$
	The equations of the tangents drawn from the origin to the circle ${{x}^{2}}+{{y}^{2}}-2rx-2hy+{{h}^{2}}=0$ are
	An infinite number of tangents can be drawn from (1, 2) to the circle ${{x}^{2}}+{{y}^{2}}-2x-4y+\lambda =0$ , then $\lambda =$
	If the line $lx+my=1$ be a tangent to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ , then the locus of the point (l, m) is
	The equations of the tangents drawn from the point (0, 1) to the circle ${{x}^{2}}+{{y}^{2}}-2x+4y=0$ are