$\sin ^2 5^{\circ}+\sin ^2 10^{\circ}+\sin ^2 15^{\circ}+\ldots+\sin ^2 90^{\circ}$ का मान ज्ञात कीजिए।

  • A
    $8 \frac{1}{2}$
  • B
    $9$
  • C
    $9 \frac{1}{2}$
  • D
    $4 \frac{1}{2}$

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