यदि $\theta$ एक न्यून कोण है और $\tan(4\theta - 50^{\circ}) = \cot(50^{\circ} - \theta)$ है,तो $\theta$ का मान डिग्री में क्या है?

  • A
    $30$
  • B
    $40$
  • C
    $20$
  • D
    $50$

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यदि $A, B, C$ एक त्रिभुज के कोण हैं,तो $\sum \frac{\cot A + \cot B}{\tan A + \tan B} = $

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$\cos 24^{\circ} + \cos 55^{\circ} + \cos 125^{\circ} + \cos 204^{\circ} + \cos 300^{\circ}$ का मान ज्ञात कीजिए।

यदि $\sqrt x + \frac{1}{{\sqrt x }} = 2\cos \theta$ है,तो ${x^6} + {x^{ - 6}} = $

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