已知sin(a+pie/3)+sina=-4根号3/5,-pie/2

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已知sin(a+pie/3)+sina=-4根号3/5,-pie/2已知sin(a+pie/3)+sina=-4根号3/5,-pie/2已知sin(a+pie/3)+sina=-4根号3/5,-pie

已知sin(a+pie/3)+sina=-4根号3/5,-pie/2
已知sin(a+pie/3)+sina=-4根号3/5,-pie/2

已知sin(a+pie/3)+sina=-4根号3/5,-pie/2
∵sin(a+π/3)+sina=-4根号3/5
∴sina/2+(cosa根号3)/2+sina=(-4根号3)/5
∴((sina*根号3)/2+cosa/2)*根号3=(-4根号3)/5
∴sin(a+π/6)=-4/5
又∵-π/2