The general solution of $sin\, x + sin \,5x = sin\, 2x + sin \,4x$ is :
The general solution of $sin\, x + sin \,5x = sin\, 2x + sin \,4x$ is :
- A
$2n\pi$
- B
$n\pi$
- C
$n\pi /3$
- D
$2 n\pi /3$ where $n \in I$
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