let S,S1 be the foci of an ellipse. If ∠BSS1 = θ,where B is any point on the ellipse. Then its eccentricity is
tan θ
sin θ
cos θ
cot θ
tan θ = bae
SB = √b2+a2e2 = a
cos θ aea = e
e = cos θ
let S,S1 be the foci of an ellipse. If ∠BSS1 = θ. Then its eccentricity is