$\sqrt{2} + \sqrt{3} + \sqrt{4} + \sqrt{6}$ किसके बराबर है?

  • A
    $\cot(7.5^{\circ})$
  • B
    $\sin(7.5^{\circ})$
  • C
    $\sin(15^{\circ})$
  • D
    $\cos(15^{\circ})$

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$0 \le \alpha_1, \alpha_2, \dots, \alpha_n \le \frac{\pi}{2}$ और $\cot \alpha_1 \cdot \cot \alpha_2 \cdots \cot \alpha_n = 1$ की शर्तों के तहत $\cos \alpha_1 \cdot \cos \alpha_2 \cdots \cos \alpha_n$ का अधिकतम मान क्या है?

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$\frac{\tan ^{2} \theta}{\sec \theta+1}-\sec \theta$ का मान ज्ञात कीजिए।

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