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sin(-14∏/3)=?
题目详情
sin(-14∏/3)=?
▼优质解答
答案和解析
sin(-14π/3)
=-sin(14π/3)
=-sin(4π+2π/3)
=-sin(2π/3)
=-sin(π-2π/3)
=-sin(π/3)
=-√3/2
=-sin(14π/3)
=-sin(4π+2π/3)
=-sin(2π/3)
=-sin(π-2π/3)
=-sin(π/3)
=-√3/2
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