Maths-
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Question

The equation of the directrix of the conic whose length of the latusrectum is 5 and eccenticity is 1/2 is

  1. 5 equals 2 r cos space theta    
  2. 10 equals r c o s space theta    
  3. 5 equals r c o s space theta    
  4. 15 equals 2 r c o s space theta    

The correct answer is: 5 equals r c o s space theta

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