AP EAMCET202017 Sep 2020Evening ShiftMathematicsHyperbolaActual
If the latus rectum of a hyperbola through one focus subtends an angle (60^ ) at the other focus, then its eccentricity is
Options
- A( 2 )
- B( 6 )
- C( 3 )
- D( 5 )
Correct answer
C. ( 3 )
Step-by-step solution
Given, latus rectum of one hyperbola subtends an angle of (60^ ) at other follows, From ( A B C ), ( array llll & 30^ = b^2 / a 2 a e & 1 3 = b^2 2 a^2 e & Also b^2 =a^2 (e^2-1 ) & So, 1 3 = a^2 (e^2-1 ) 2 a^2 e & 2 e = 3 (e^2-1 ) & e = 3 array )