Ab and Ac are two equal chords of a circle whose centre is O. If OD⊥AB and OE⊥AC, prove that triangle ADE is an isosceles triangle.

Ab and Ac are two equal chords of a circle whose centre is O. If $O D ⊥ A B a n d O E ⊥ A C$ , prove that triangle ADE is an isosceles triangle.

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