If $y = m x + c$ is the tangent to the circle $x^{2} + y^{2} = r^{2},$ . then the coordinates of point of contact are

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Solution

$\begin{matrix} I f y = m x + c i n t a n g e n t t o c i r c l e x^{2} + y^{2} = r^{2} T h e n, p o i n t o f c o n t a c t i s (- \frac{r^{2} m}{c}, \frac{r^{2}}{c}) \end{matrix}$

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