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For any triangle ABC, prove that(b^2-c^2...

For any triangle ABC, prove that`(b^2-c^2)/(a^2)sin2A+(c^2-a^2)/(b^2)sin2B+(a^2-b^2)/(c^2)sin2C=0`

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To prove the equation \[ \frac{b^2 - c^2}{a^2} \sin 2A + \frac{c^2 - a^2}{b^2} \sin 2B + \frac{a^2 - b^2}{c^2} \sin 2C = 0 \] for any triangle ABC, we will follow these steps: ...
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