यदि $2 \tan^2 \theta - 4 \sec \theta + 3 = 0$ है,तो $2 \sec \theta =$

  • A
    $3$
  • B
    $2 + \sqrt{2}$ और $2 - \sqrt{2}$
  • C
    $2 - \sqrt{2}$
  • D
    $2 + \sqrt{2}$

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यदि $\cos x + \sec x = -2$ है,तो एक धनात्मक पूर्णांक $n$ के लिए,$\cos^n x + \sec^n x$ का मान क्या होगा?

मान लीजिए $S = \left\{ \theta \in \left( 0, \frac{\pi}{2} \right) : \sum_{m=1}^{9} \sec \left( \theta + (m-1) \frac{\pi}{6} \right) \sec \left( \theta + \frac{m \pi}{6} \right) = -\frac{8}{\sqrt{3}} \right\}$. तो:

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