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JEE Main & Advanced Mathematics Triangles & Properties of Triangle Question Bank Numerical Value Type Questions - Properties of Triangle

  • question_answer
    In any\[\Delta ABC\], find value of \[\left( \frac{b-c}{a} \right){{\cos }^{2}}\left( \frac{A}{2} \right)\]\[+\left( \frac{c-a}{b} \right){{\cos }^{2}}\left( \frac{B}{2} \right)+\left( \frac{a-b}{2} \right){{\cos }^{2}}\left( \frac{C}{2} \right).\]

    Answer:

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