$\sin^2 5^\circ + \sin^2 10^\circ + \sin^2 15^\circ + \dots + \sin^2 85^\circ + \sin^2 90^\circ$ का मान क्या है?

  • A
    $7$
  • B
    $8$
  • C
    $9$
  • D
    $9\frac{1}{2}$

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