Q.
If the tangent at a point $(a\cos\theta,\ b\sin{\theta)}$ on the ellipse $\frac{x^{2}}{a^{2}} + \frac{y^{2}}{b^{2}} = 1$ meets the auxiliary circle in two points, the chord joining them subtends a right angle at the centre, then the eccentricity of the ellipse is given by
A) ${(1 + \cos^{2}\theta)}^{- \frac{1}{2}}$
B) $(1 + \sin^{2}\theta)$
C) ${(1 + \sin^{2}\theta)}^{- \frac{1}{2}}$
D) $(1 + \cos^{2}\theta)$
Explanation
The correct answer is Option B: $(1 + \sin^{2}\theta)$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.