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if the curves y2=6x, 9x2+by2=16 intersect each other at right angles, then the value of b is :


Snhl Umale 14th Apr, 2018
Answer (1)
Md Bahauddin 10th Jun, 2018

Hey Snhl,

  • You can use this formula :>  tanA=(+-) (m2-m1)/(1+m1*m2).  Since curves intersect at right angle so A=90 degree.
  • So tanA=infinity. Then 1+m1*m2=0 this is equation 1
  • solve the given two equation and eliminate either x or y.

Solve the above equations, you will get your answer.


Good Luck!

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