2. For \( x \in(0, \pi) \), the equation \( \sin x+2 \sin 2 x-\sin ...

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2. For \( x \in(0, \pi) \), the equation \( \sin x+2 \sin 2 x-\sin 3 x=3 \) has
\( \mathrm{P} \)
(1) infinitely many solutions
W
(2) three solutions
(3) one solution
(4) no solution
(JEE Advanced 2014)
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