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Exercise3.4 ncert question is 9 |
| Answer» Sinx + sin5x + sin3x=02sin3x cos2x + sin3x =0Sin3x(2cos2x+1)=0If sin3x=03x=n(pie);n€zIf Cos2x+1=0Cos2x=-1/2Cos2x=cos2(pie)/3 | |