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Grade: 11

                        

Please answer this question it`s urgent Sinx + sin3x + sin5x = 0

3 years ago

Answers : (1)

Laltesh Singh
50 Points
							Sinx + sin3x + sin5x = 0Sin5x + sinx + sin3x = 02 sin3x cos2x + sin3x = 0sin3x ( 2 cosx + 1) = 0sin3x = 0       or        cos2x = -1/23x = nπ          or              2x = 2nπ +-2π/3  x = nπ/3       or                x = nπ +- π/3
						
3 years ago
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