यदि $0^{\circ} < \theta < 90^{\circ}$ है,तो $\sin \theta + \cos \theta$ का मान है

  • A
    $1$ के बराबर
  • B
    $1$ से अधिक
  • C
    $1$ से कम
  • D
    $2$ के बराबर

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$\tan \left( \frac{\pi }{4} + \theta \right) - \tan \left( \frac{\pi }{4} - \theta \right) = $

यदि $\tan \alpha = n \tan \beta$ और $\sin \alpha = m \sin \beta$ है,तो $\frac{m^{2}-1}{n^{2}-1} =$

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