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If theta and phi are eccentric angles o...

If `theta` and `phi` are eccentric angles of the end of a pair of conjugate diameters of the ellipse `(x^(2))/(a^(2))+(y^(2))/(b^(2))=1` then `theta-phi` is equal to

A

`pm(pi)/(2)`

B

`pm pi`

C

0

D

none

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The correct Answer is:
a
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