$\tan 9^\circ - \tan 27^\circ - \tan 63^\circ + \tan 81^\circ = $

  • A
    $1/2$
  • B
    $2$
  • C
    $4$
  • D
    $8$

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यदि $r \sin \theta = 3$ और $r = 4(1 + \sin \theta)$ जहाँ $0 \le \theta \le 2\pi$,तो $\theta = $

यदि $\tan \alpha = \frac{x^2 - x}{x^2 - x + 1}$ और $\tan \beta = \frac{1}{2x^2 - 2x + 1}$ $(x \ne 0, 1)$,जहाँ $0 < \alpha, \beta < \frac{\pi}{2}$ है,तो $\tan(\alpha + \beta)$ का मान किसके बराबर है?

मान लीजिए $E = \left( 1 - \frac{\cos 61^\circ}{\cos 1^\circ} \right) \left( 1 - \frac{\cos 62^\circ}{\cos 2^\circ} \right) \dots \left( 1 - \frac{\cos 119^\circ}{\cos 59^\circ} \right)$,तो $E$ का मान ज्ञात कीजिए।

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

यदि $2 \tan^2 \theta - 4 \sec \theta + 3 = 0$ है,तो $2 \sec \theta =$

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