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the area of the triangle formed by the tangent at the pt. (a,b) to the circle x2 +y2 =r2and the coordinate axis


 

4 years ago

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Answers : (1)

										

Equation of tangent is 


 


ax+by-r^2 = 0


In x-y intercept form


 


x/(r^2/a) + y/(r^2/b) = 1


 


x-intercept = r^2/b


y-intercept = r^2/b


 


Area of triangle = 1/2*r^2/b*r^2/b = r4/(2ab)

4 years ago

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