circle

Question: If the line $y=mx+c$ be a tangent to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ , then the point of contact is

1) $\left( \frac{-{{a}^{2}}}{c},{{a}^{2}} \right)$

2) $\left( \frac{{{a}^{2}}}{c},\frac{-{{a}^{2}}m}{c} \right)$

3) $\left( \frac{-{{a}^{2}}m}{c},\frac{{{a}^{2}}}{c} \right)$

4) $\left( \frac{-{{a}^{2}}c}{m},\frac{{{a}^{2}}}{m} \right)$

Solution:

Explanation: No Explanation

Tangent and normal to a circle

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