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IIT JEE 2006 Paper : MATHEMATICS Section II - Multiple Answers


Each question has one or more than one correct choice among (a), (b), (c) and (d). Write down all the correct choices in alphabetical order without any spaces in between.
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abd
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The internal angular bisector AD of ΔABC cuts the side BC at D. A line EF passing through D and perpendicular to AD cuts the side AC at E and the extended part of side AB at F, then

(a)AE is harmonic mean of b and c.
(b)ΔAEF is isosceles.
(c)AD = 2bc cos(A/2) / (b + c) .
(d)EF = bc sin(A/2)

 



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