यदि $\alpha \in \left( 0, \frac{\pi}{2} \right)$ है,तो $\sqrt{x^2 + x} + \frac{\tan^2 \alpha}{\sqrt{x^2 + x}}$ हमेशा किससे बड़ा या उसके बराबर होता है?

  • A
    $2 \tan \alpha$
  • B
    $1$
  • C
    $2$
  • D
    $\sec^2 \alpha$

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$\frac{\sec 8A - 1}{\sec 4A - 1} = $

$\cos ^{2} \theta+\sec ^{2} \theta$ का मान हमेशा

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