sin(a+π/3)+sina=-4√3/5,-π/2
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sinA=3sin(2π/3-A) SINA=?sinA=3sin(2π/3-A) SINA=?答案是-3√3cosA
已知sin(a+π/3)+sina=-4√3/5,-π/2
sin(a+π/3)+sina=-4√3/5,-π/2
已知sin(a+π/3)+sina=-4√3/5,-π/2
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