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PS for co-ordinate geometry

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Joined: 02 Sep 2008
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PS for co-ordinate geometry [#permalink] New post 06 Apr 2009, 00:42
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Senior Manager
Senior Manager
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Joined: 08 Jan 2009
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Re: DS for co-ordinate geometry............. [#permalink] New post 06 Apr 2009, 18:08
p(-3^1/2,1) and Q(s,t)

OP = OQ

distance bw O and P = 4
distance bw O and Q = s^2 + t^2

s^2 + t^2 = 4 ------------- 1

Slope of OP = -1/(3^1/2)
Slope of OQ = 3^1/2

therefore t-0/s-0 = 3^1/2 t = s * 3^1/2 --- 2

sub 2 in 1
s^2 + 3 s^2 = 1 .. s^2 = 1 and s = +1 or -1
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Re: DS for co-ordinate geometry............. [#permalink] New post 13 Apr 2009, 19:34
With trignometry this can be solve easily.
Re: DS for co-ordinate geometry.............   [#permalink] 13 Apr 2009, 19:34
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PS for co-ordinate geometry

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