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find the area of the quadrilateral formed by a pair of tangents from the point (4,5) to the circle `x^2 + y^2 -4x -2y-11 = 0` and pair of its radii. |
Answer» `C:x^2+y^2-4x-2y-11=0` `(x-2)^2+(y-1)^2=4^2` `PC=sqrt((4-2)^2+(5-1)^2)=sqrt21` PA=2 units. area of PACB=2 area of PAC `=2*1/2*2*4` `=8 unit^2` |
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