$\frac{1}{\sin^2 x + 3 \sin x \cos x + 5 \cos^2 x}$ નો વિસ્તાર શોધો.

  • A
    $\left[2, \frac{11}{2}\right]$
  • B
    $\left[\frac{1}{2}, \frac{11}{2}\right]$
  • C
    $\left[\frac{2}{11}, \frac{1}{2}\right]$
  • D
    $\left[\frac{2}{11}, 2\right]$

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