यदि $29 \tan \theta = 31$ है,तो $\frac{1+2 \sin \theta \cos \theta}{1-2 \sin \theta \cos \theta}$ का मान किसके बराबर है?

  • A
    $540$
  • B
    $490$
  • C
    $810$
  • D
    $900$

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यदि $A, B, C$ न्यून धनात्मक कोण इस प्रकार हैं कि $A + B + C = \pi$ और $\cot A \cot B \cot C = K$,तो

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$\frac{1}{4} \tan \frac{\pi}{8} + \frac{1}{8} \tan \frac{\pi}{16} + \frac{1}{16} \tan \frac{\pi}{32} + \dots \infty$ पदों का मान किसके बराबर है?

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