EllipseHard
Question
The line x cos α + y sin α = p will be a tangent to the conic 
= 1, if-
= 1, if-Options
A.p2 = a2 sin2a + b2 cos2a
B.p2 = a2 + b2
C.p2 = b2 sin2α + a2 cos2α
D.None of these
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