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If in a triangle ABC, (bc)/(2 cos A) = b...

If in a triangle `ABC, (bc)/(2 cos A) = b^(2) + c^(2) - 2bc cos A` then prove that the triangle must be isosceles.

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To prove that triangle ABC is isosceles given the equation \(\frac{bc}{2 \cos A} = b^2 + c^2 - 2bc \cos A\), we will follow these steps: ### Step 1: Start with the given equation We have: \[ \frac{bc}{2 \cos A} = b^2 + c^2 - 2bc \cos A \] ...
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