tangent eqn nahi aati?? to dekho
26 Apr 2007 12:05:43 IST
tangent eqn nahi aati?? to dekho
shrtct to find eqn of tangent to ellipse
eg. take this
Q)find the eqn of ellipse if its eqn of chord is 2x2 + 5y2 = 20 which is bisected at (2,1) ??????????
Sol....first write eqn in terms of xx1 and yy1
like 2xx1 + 5yy1 = 20
now satisfy this pt. (2,1) here
it will bcome 4x + 5y = 20 now subtract coeff. of x and y (given in very first eqn) frm the rt. hand side's const. term
final ans is 4x + 5y = 13
ekdum original
hope u like that


















































Comments (11)
Taher Saifuddin
Cool goIITian

Joined: 7 Apr 2007 12:51:51 IST
Posts: 54
26 Apr 2007 13:00:29 IST
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how can the eqn of a chord be of second degree?
27 Apr 2007 01:46:51 IST
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boy, i guess dis1s da 1st post dat has fetched you soooo many pts :D












