જો $\sin x - \sin y = \frac{27}{65}$ અને $\cos x - \cos y = -\frac{21}{65}$ હોય,તો $\sin(x + y)$ ની કિંમત શોધો.

  • A
    $-\frac{63}{65}$
  • B
    $\frac{16}{65}$
  • C
    $\frac{63}{65}$
  • D
    $-\frac{16}{65}$

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