sin(-10π/3)的值等于
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sin(-10π/3)的值等于
![sin(-10π/3)的值等于](/uploads/image/z/20099254-22-4.jpg?t=sin%EF%BC%88-10%CF%80%2F3%EF%BC%89%E7%9A%84%E5%80%BC%E7%AD%89%E4%BA%8E)
sin(-10π/3)
=sin(-4π+2π/3)
=sin(2π/3)
=sin(π-π/3)
=sin(π/3)
=√3/2
再问: 为什么sin(-10π/3) =sin(-4π+2π/3) 为什么成了(-4π+2π/3)
再答: 因为 -10/3= -4 + 2/3 所以 -10π/3=-4π+2π/3
=sin(-4π+2π/3)
=sin(2π/3)
=sin(π-π/3)
=sin(π/3)
=√3/2
再问: 为什么sin(-10π/3) =sin(-4π+2π/3) 为什么成了(-4π+2π/3)
再答: 因为 -10/3= -4 + 2/3 所以 -10π/3=-4π+2π/3
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