यदि $\tan \theta + \cot \theta = 2$ है,तो $\sin \theta =$

  • A
    $\pm \frac{1}{2}$
  • B
    $\frac{1}{\sqrt{2}}$
  • C
    $\pm \frac{1}{3}$
  • D
    इनमें से कोई नहीं

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$\sin ^{2} 22^{\circ}+\sin ^{2} 68^{\circ}+\cot ^{2} 30^{\circ}$ का मान ज्ञात कीजिए।

यदि $a \tan \theta = b$ है,तो $a \cos 2\theta + b \sin 2\theta = $

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