यदि $\tan \alpha = \frac{1}{7}$ और $\tan \beta = \frac{1}{3}$ है,तो $\cos 2\alpha = $

  • A
    $\sin 2\beta$
  • B
    $\sin 4\beta$
  • C
    $\sin 3\beta$
  • D
    इनमें से कोई नहीं

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$\frac{1}{\tan 3A - \tan A} - \frac{1}{\cot 3A - \cot A} = $

$(4 \cos^2 9^{\circ} - 3)(4 \cos^2 27^{\circ} - 3) = $

यदि $\sin x = \frac{1}{4}$ और $x$ द्वितीय चतुर्थांश में है,तो $\sin \frac{x}{2}, \cos \frac{x}{2}$ और $\tan \frac{x}{2}$ का मान ज्ञात कीजिए।

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यदि $\sin 6 \theta = 32 \cos^5 \theta \sin \theta - 32 \cos^3 \theta \sin \theta + 3x$ है,तो $x$ का मान ज्ञात कीजिए:

मान ज्ञात कीजिए: $\csc A - 2 \cot 2A \cos A$

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