$\sin ^{2} 17.5^{\circ} + \sin ^{2} 72.5^{\circ}$ का मान ज्ञात कीजिए।

  • A
    $\cos ^{2} 90^{\circ}$
  • B
    $\tan ^{2} 45^{\circ}$
  • C
    $\cos ^{2} 30^{\circ}$
  • D
    $\sin ^{2} 45^{\circ}$

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