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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$\sin ^2 \frac{\pi}{8} + \sin ^2 \frac{3\pi}{8} + \sin ^2 \frac{5\pi}{8} + \sin ^2 \frac{7\pi}{8}$ का मान है

यदि $\sqrt{3} \cos \theta + \sin \theta > 0$ है,तो:

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