Questions tagged 'Tangent and normal to a circle'

• If the length of tangent drawn from the point (5, 3) to the circle ${{x}^{2}}+{{y}^{2}}+2x+ky+17=0$ be 7, then $k =$
  Category: circle | Tags: Tangent and normal to a circle
• The line $lx+my+n=0$ will be a tangent to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ iff
  Category: circle | Tags: Tangent and normal to a circle
• The angle between the two tangents from the origin to the circle ${{(x-7)}^{2}}+{{(y+1)}^{2}}=25$ is
  Category: circle | Tags: Tangent and normal to a circle
• A pair of tangents are drawn from the origin to the circle ${{x}^{2}}+{{y}^{2}}+20(x+y)+20=0$ . The equation of the pair of tangents is
  Category: circle | Tags: Tangent and normal to a circle
• If OA and OB be the tangents to the circle ${{x}^{2}}+{{y}^{2}}-6x-8y+21=0$ drawn from the origin O, then $AB =$
  Category: circle | Tags: Tangent and normal to a circle
• Equation of the pair of tangents drawn from the origin to the circle ${{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0$ is
  Category: circle | Tags: Tangent and normal to a circle
• If the line $y=mx+c$ be a tangent to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ , then the point of contact is
  Category: circle | Tags: Tangent and normal to a circle
• The locus of the centre of a circle which passes through the point (a, 0) and touches the line $x+1=0$ , is
  Category: circle | Tags: Tangent and normal to a circle
• A point inside the circle ${{x}^{2}}+{{y}^{2}}+3x-3y+2=0$ is
  Category: circle | Tags: Tangent and normal to a circle
• Position of the point (1, 1) with respect to the circle ${{x}^{2}}+{{y}^{2}}-x+y-1=0$ is
  Category: circle | Tags: Tangent and normal to a circle

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