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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 9

  • question_answer
    If \[{{z}_{1}},{{z}_{2}}\] and \[{{z}_{3}}\] are three distinct points on circle \[|z|=1,\] then minimum value of \[\cos (\arg \,{{z}_{1}}-\arg {{z}_{2}})+\cos (\arg {{z}_{2}}-\arg {{z}_{3}})+\cos (\arg {{z}_{3}}-\arg {{z}_{1}})\]is ______.

    Answer:

    -3


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