જો $A+B+C=\frac{\pi}{4}$ હોય,તો $\sin 4A+\sin 4B+\sin 4C=$

  • A
    $4 \cos 2A \cos 2B \cos 2C$
  • B
    $4 \sin 2A \sin 2B \sin 2C$
  • C
    $1+4 \sin 2A \sin 2B \sin 2C$
  • D
    $1+4 \cos 2A \cos 2B \cos 2C$

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