यदि $0 < x < \frac{1}{2}$ और $\alpha = \sin^{-1} x + \cos^{-1} \left( \frac{x}{2} + \frac{\sqrt{3 - 3 x^2}}{2} \right)$ है,तो $\tan \alpha + \cot \alpha =$

  • A
    $\frac{4}{\sqrt{3}}$
  • B
    $4 \sqrt{3}$
  • C
    $\frac{4 x}{1 - x^2}$
  • D
    $x \sqrt{1 - x^2}$

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यदि ${\cot ^{ - 1}}\frac{n}{\pi } > \frac{\pi }{6},\,\,n \in N$ है,तो $n$ का अधिकतम मान क्या है?

सिद्ध कीजिए कि $\cos ^{-1} \frac{4}{5} + \cos ^{-1} \frac{12}{13} = \cos ^{-1} \frac{33}{65}$

यदि $\frac{1}{2} \leq x \leq 1$ है, तो $\cos ^{-1} x+\cos ^{-1}\left(\frac{x}{2}+\frac{1}{2} \sqrt{3-3 x^2}\right)$ का मान ज्ञात कीजिए।

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