giai pt luong giac

N

nguyenbahiep1

3)

[TEX]sin3x+cos4x=2[/TEX]

[TEX] sin3x \leq 1 \\ cos4x \leq1 [/TEX]

[TEX] \left{\begin{sin 3x = 1}\\ {cos4x = 1}[/TEX]
 
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