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

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