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sin(-4π/3)怎么算
人气:453 ℃ 时间:2020-05-12 04:35:52
解答
sin(-4π/3)
=-sin(4π/3)
=-sin[(3π+π)/3]
=-sin[π+π/3]
=sin[π/3]
=sin[60°]
=√3/2
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