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Question

All possible values of eccentric angle of (x1,y1) on x26+y22=1 whose distance fromt the centre is 2.

A
± 45.
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B
45
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C
-45
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D
90
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Solution

The correct option is A ± 45.
Let the ecentric angle be t, and a2=6;b2=2
x1=a cos t y1=b sin t
(a cos t)2+(b sin t)2=4
t = ± 45.

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