circle

Question: Equation of the tangent to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ which is perpendicular to the straight line $y=mx+c$ is

1) $y=-\frac{x}{m}\pm a\sqrt{1+{{m}^{2}}}$

2) $x+my=\pm \text{ }a\text{ }\sqrt{1+{{m}^{2}}}$

3) $x+my=\pm a\sqrt{1+{{(1/m)}^{2}}}$

4) $x-my=\pm a\sqrt{1+{{m}^{2}}}$

Solution:

Explanation: No Explanation

Tangent and normal to a circle

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