Maths-
General
Easy

Question

If the chord joining two points whose eccentric angles are alpha and beta cuts the major axis of an ellipse fraction numerator x to the power of 2 end exponent over denominator a to the power of 2 end exponent end fraction + fraction numerator y to the power of 2 end exponent over denominator b to the power of 2 end exponent end fraction = 1 at a distance c from the centre, then tan alpha divided by 2. tan beta divided by 2 is equal to

  1. 1    
  2. c    
  3. fraction numerator c plus a over denominator c minus a end fraction    
  4. fraction numerator c – a over denominator c plus a end fraction    

The correct answer is: fraction numerator c plus a over denominator c minus a end fraction

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