જો $0 < \theta < \frac{\pi}{4}$ અને $8 \cos \theta + 15 \sin \theta = 15$ હોય,તો $15 \cos \theta - 8 \sin \theta = $

  • A
    $15$
  • B
    $7$
  • C
    $8$
  • D
    $23$

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