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Asked by vikas Shankar | 2nd Sep, 2011, 04:38: PM

Expert Answer:

Let the locus of the point be (x1,y1)
Given,the length of the tangent from(x1,y1) to the circle x2+y2=16 is 5 times the distance from the line 3x-4y+5=0.
we know the length of the tangent to the circle is x2+y2=r2 is given by : (x12+y12-r2)1/2.
And length of the tangent to the line 3x-4y+5=0 is :

Answered by  | 6th Sep, 2011, 10:31: AM

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