K
khongphaibang


giải phương trình : a, 8sinx =can3/cosx + 1/sinx
b, sinx + cosx.sin2x + can3.cos3x = 2.(cos4x + sin^3x):-B
b, sinx + cosx.sin2x + can3.cos3x = 2.(cos4x + sin^3x):-B
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