यदि $\sec \theta = m$ और $\tan \theta = n$ है,तो $\frac{1}{m} \left[ m + n + \frac{1}{m + n} \right] = $

  • A
    $1$
  • B
    $2$
  • C
    $-1$
  • D
    $3$

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यदि $\cos \theta, \sin \theta$ और $\cot \theta$ गुणोत्तर श्रेणी में हैं,तो $\sin ^9 \theta+\sin ^6 \theta+3 \sin ^5 \theta+\sin ^3 \theta+\sin ^2 \theta=$

यदि $\sin 2\theta + \sin 2\phi = 1/2$ और $\cos 2\theta + \cos 2\phi = 3/2$ है,तो $\cos^2(\theta - \phi) = $

$\frac{1}{\sin 1^{\circ} \sin 2^{\circ}}+\frac{1}{\sin 2^{\circ} \sin 3^{\circ}}+\ldots+\frac{1}{\sin 89^{\circ} \sin 90^{\circ}} = $

समीकरण $e^{\sin x} - e^{\sin(-x)} - 4 = 0$ के

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