The number of solution of sinx+sin2x+sin...

The number of solution of `sinx+sin2x+sin3x=cosx+cos2x+cos3x ,0lt=xlt=2pi,` is

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The general solution of the equation sinx-3sin2x+sin3x=cosx-3cos2x+cos3x is

The general solution of the equation sinx-3sin2x+sin3x=cosx-3cos2x+cos3x is (n in Z) npi+pi/8 (b) (npi)/2+pi/8 (-1)^n(npi)/2+pi/8 (d) 2npi+cos^(-1)2/3

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