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QJEEAdv06Ma5ba0: JEE Advanced 2006 Mathematics - Class 11 JEEAdv06Ma5ba0 Solution: In Δ A B C , internal angle bisector of ∠ A meets side B C in D …

In

Δ A B C

, internal angle bisector of

∠ A

meets side

B C

in

D

.

D E ⊥ A D

meets

A C

in

E

and

A B

in

F

. Then

Multiple Choice Options

A AE is HM of b and c
B AD =2bcb+ccos⁡A2
C EF =4bcb+csin⁡A2
D ΔAEF is isosceles

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