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If tantheta1.tantheta2=a^2/b^2 then the ...

If `tantheta_1.tantheta_2=a^2/b^2` then the chord Joining two points `theta_1 and theta_2` on the ellipse `x^2/a^2+y^2/b^2=1` will subtend a right angle at (A) focus (B) centre (C) end of the major axis (D) end of the major axis

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