$\frac{\cos 17^\circ + \sin 17^\circ}{\cos 17^\circ - \sin 17^\circ} = $

  • A
    $\tan 62^\circ$
  • B
    $\tan 56^\circ$
  • C
    $\tan 54^\circ$
  • D
    $\tan 73^\circ$

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यदि $\cot \alpha = 1$ और $\sec \beta = -\frac{5}{3}$,जहाँ $\pi < \alpha < \frac{3\pi}{2}$ और $\frac{\pi}{2} < \beta < \pi$ है,तो $\tan(\alpha + \beta)$ का मान और वह चतुर्थांश जिसमें $\alpha + \beta$ स्थित है,क्रमशः हैं

$\sin (x+y) \sec x \sec y=$

$\frac{\sin(B + A) + \cos(B - A)}{\sin(B - A) + \cos(B + A)} = $

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यदि $\sin A = \frac{4}{5}$ और $\cos B = -\frac{12}{13}$ है,जहाँ $A$ और $B$ क्रमशः प्रथम और तृतीय चतुर्थांश में स्थित हैं,तो $\cos(A + B) = $

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