Mathematics

$$ \int _{ -\pi  }^{ \pi  }{ \cfrac { { cos }^{ 4 }x }{ { sin }^{ 4 }{ x+cos }^{ 4 }x }  } dx $$=...


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$$ \cfrac { \pi} {4} $$


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Single Correct Medium Published on 17th 09, 2020
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