AP and TS EAMCET Engineering Model Paper 6

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Question : 69 of 160
 
Marks: +1, -0
S and T are the foci of the ellipse (
x2
a2
)
+(
y2
b2
)
=1
and B is an end of the minor axis. If STB is an equilateral triangle, then eccentricity of the ellipse is
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