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IMG_20190220_115956.jpg (c) Parametric form : The equation of a tangent to circle x2 + Y2 (a eos a, a sin u) is : x Cosa + y Sina = a. a2 at The point of intersection ofthe tangents at the points P(u) & Q(ß) is: asin a cos Cl—ß 2 2

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@Arvind

\\equation\:of\:tangent\:at\:pt\:A\\x\cos\alpha+y\sin\alpha=a\\tangent\:at\:pt\:B\\x\cos\beta+y\sin \beta=a\\from\:eq\:1\\x\cos\alpha+y\sin\alpha=x\cos\beta+y\sin \beta=a\\\frac{x}{y}=\frac{\sin\beta-\sin\alpha}{\cos\alpha-\cos\beta}\\from\:both\:the\:equation\:of\:tangent\:\\\frac{y}{x}=\frac{r-x\cos \left(a\right)}{x\sin \left(a\right)}\\put\:the\:value\:of\:y/x\:and\:get\:eqution\:in\:terms\:of\: x

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