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If a chord P(theta) Q(phi) of an ellips...

If a chord ` P_(theta) Q_(phi)` of an ellipse `(x^(2))/(a^(2)) + (y^(2))/(b^(2)) = 1` subtands a right angle at the vertex A (a,0), then
` tan ((theta)/(2))* tan ((phi)/(2))= `

A

`(-a^(2))/(b^(2))`

B

`(-b^(2))/(a^(2))`

C

`(-b^(2))/(a)`

D

`-(a)/(b)`

Text Solution

Verified by Experts

The correct Answer is:
B
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