यदि $\frac{1 - \cos x}{\cos x(1 + \cos x)} = \frac{\sin \alpha}{\cos x} - \frac{2}{1 + \cos x}$ है,तो $\alpha = $

  • A
    $\frac{\pi}{8}$
  • B
    $\frac{\pi}{4}$
  • C
    $\frac{\pi}{2}$
  • D
    $\pi$

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$\text{यदि } \sin(\alpha+\beta)=1, \sin(\alpha-\beta)=\frac{1}{2}, \alpha, \beta \in [0, \frac{\pi}{2}], \text{ तो } \tan(\alpha+2\beta) \cdot \tan(2\alpha+\beta) = ?$

मान लीजिए $A$ और $B$ कथन हैं:
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