यदि $\tan \left(\frac{\pi}{4}+\frac{\alpha}{2}\right)=\tan ^3\left(\frac{\pi}{4}+\frac{\beta}{2}\right)$ है,तो $\frac{3+\sin ^2 \beta}{1+3 \sin ^2 \beta}=$

  • A
    $\frac{\cos \beta}{\cos \alpha}$
  • B
    $\frac{\cos ^3 \alpha}{\sin ^3 \beta}$
  • C
    $\frac{\sin \alpha}{\sin \beta}$
  • D
    $\frac{\cos \alpha}{\cos \beta}$

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