$\frac{\sin 3\theta + \sin 5\theta + \sin 7\theta + \sin 9\theta}{\cos 3\theta + \cos 5\theta + \cos 7\theta + \cos 9\theta} = $

  • A
    $\tan 3\theta$
  • B
    $\cot 3\theta$
  • C
    $\tan 6\theta$
  • D
    $\cot 6\theta$

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${\left( {\frac{{\cos A + \cos B}}{{\sin A - \sin B}}} \right)^n} + {\left( {\frac{{\sin A + \sin B}}{{\cos A - \cos B}}} \right)^n}$ ($n$ सम या विषम है) $=$

$\sin 50^\circ - \sin 70^\circ + \sin 10^\circ = $

$\cot (45^\circ + \theta ) \cot (45^\circ - \theta ) = $

यदि $\tan \theta + \cot \theta = 2$ है,तो $\tan^{100} \theta + \cot^{100} \theta$ का मान ज्ञात कीजिए।

$5 \cos \theta + 3 \cos \left( \theta + \frac{\pi}{3} \right) - 1$ का अधिकतम मान है

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