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Sin4x +sin3x+sin2x =0
1.
Sin4x +sin3x+sin2x =0
Answer» Sin4x+sin2x+sin3x=0L.H.S:- 2.sin (4x+2x)/2.cos (4x-2x)/2 +sin3x=2sin3xcosx +sin3x =sin3x (2cosx+1)=
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