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sin(x+pai/6)=1/4,sin(5/6pai-x)+sin^2(11/6pai-x)的值为
题目详情
sin(x+pai/6)=1/4,sin(5/6pai-x)+sin^2(11/6pai-x)的值
为
为
▼优质解答
答案和解析
sin(x+pai/6)=1/4=sinxcospai/6+sinpai/6cosx=√3/2sinx+1/2cosx
,sin(5/6pai-x)+sin^2(11/6pai-x)=sin5/6paicosx-cos5/6paisinx+sin(2π-π/6-x)稍等
,sin(5/6pai-x)+sin^2(11/6pai-x)=sin5/6paicosx-cos5/6paisinx+sin(2π-π/6-x)稍等
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