यदि $\sin \theta + \cos \theta = 1$ है,तो $\sin \theta \cos \theta = $

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $0.5$

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यदि $\cos \alpha + \cos \beta = \frac{3}{2}$ और $\sin \alpha + \sin \beta = \frac{1}{2}$ है और $\theta$,$\alpha$ और $\beta$ का समांतर माध्य है,तो $\sin 2\theta + \cos 2\theta$ का मान ज्ञात कीजिए।

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