योगफल ज्ञात कीजिए: $\sin^2(3^{\circ}) + \sin^2(6^{\circ}) + \sin^2(9^{\circ}) + \dots + \sin^2(84^{\circ}) + \sin^2(87^{\circ}) + \sin^2(90^{\circ})$

  • A
    $\frac{31}{2}$
  • B
    $\frac{39}{2}$
  • C
    $\frac{59}{2}$
  • D
    $36$

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