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Reply Forum Index -> Analytical Geometry originally posted here on IIT-JEE / AIEEE community   
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[Post New] 4 Feb 2012 11:27:09 IST
   Subject: pair of straight lines
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sidharthsekharsahoo (5)

Olaaa!! Perrrfect answer. 1  [1 rates]
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the eqn of the straight line passing througfh (1,2) and having an intercept of length 3 b/w the sraight lines 3x+4y=24 and 3x +4y=12
    
[Post New] 7 Feb 2012 22:59:20 IST
   Subject: pair of straight lines
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Manasi (3976)

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Olaaa!! Perrrfect answer. 702  bad job dude!! I dont approve of this answer! 2  [939 rates]
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       cos # = 2.4 / 3
                  = 4/5
 =>  # = 37 degrees
now tan (180-$) = slope of the line = -3/4
=> $ = 37 degrees
therefore, the slope of the required line = tan @ = tan (90- $ - # )
                                                                       = tan (90- 74)
                                                                       = cot 74
now u have the slope, and the point.. u can write the equation of the line :)
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