Mathematics, 22.06.2021 04:10, joejoe247

Cho sinx + cosx= 1/2 và x lớn hơn hoặc bằng pi trên 4 , nhỏ hơn hoặc bằng pi trên 2 . Tính sin2x và cos2x

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Cho sinx + cosx= 1/2 và x lớn hơn hoặc bằng pi trên 4 , nhỏ hơn hoặc bằng pi trên 2 . Tính sin2x và...