Categories > circle > Tangent and normal to a circle > The equation of the tangent to the circle ${{x}^{2}}+{{y}^{2}}={{r}^{2}}$ at $(a,b)$ is $ax+by-\lambda =0$ , where $\lambda $ is

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Question: The equation of the tangent to the circle ${{x}^{2}}+{{y}^{2}}={{r}^{2}}$ at $(a,b)$ is $ax+by-\lambda =0$ , where $\lambda $ is


1) ${{a}^{2}}$
2) ${{b}^{2}}$
3) ${{r}^{2}}$
4) None of these
Solution: Explanation: No Explanation
Tangent and normal to a circle

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