यदि $\sin (A + B) = 1$ और $\cos (A - B) = \frac{\sqrt{3}}{2}$ है,तो $A$ और $B$ के सबसे छोटे धनात्मक मान ज्ञात कीजिए।

  • A
    $60^\circ, 30^\circ$
  • B
    $75^\circ, 15^\circ$
  • C
    $45^\circ, 60^\circ$
  • D
    $45^\circ, 45^\circ$

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यदि $\sin x = -\frac{3}{5}$,जहाँ $\pi < x < \frac{3\pi}{2}$ है,तो $80(\tan^2 x - \cos x)$ का मान ज्ञात कीजिए:

$\frac{1}{\cos 290^{\circ}}+\frac{1}{\sqrt{3} \sin 250^{\circ}} = $

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