$\frac{\sin \theta + \sin 2\theta }{1 + \cos \theta + \cos 2\theta } = $

  • A
    $\frac{1}{2}\tan \theta $
  • B
    $\frac{1}{2}\cot \theta $
  • C
    $\tan \theta $
  • D
    $\cot \theta $

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$\sin ^{6} \theta+\cos ^{6} \theta$ का मान क्या है?

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यदि $\sin \theta + \sin \phi = a$ और $\cos \theta + \cos \phi = b$ है,तो $\tan \frac{\theta - \phi}{2}$ का मान ज्ञात कीजिए।

यदि $\cos^6 \alpha + \sin^6 \alpha + K \sin^2 2\alpha = 1$ है,तो $K =$

$\cos 2(\theta + \phi ) - 4\cos (\theta + \phi )\sin \theta \sin \phi + 2{\sin ^2}\phi = $

$\cos (270^\circ + \theta )\,\cos (90^\circ - \theta ) - \sin (270^\circ - \theta )\,\cos \theta $ का मान क्या है?

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