sin(-π/3)+2sin5/3π+3sin2/3的值等于?
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sin(-π/3)+2sin5/3π+3sin2/3的值等于?sin(-π/3)+2sin5/3π+3sin2/3的值等于?sin(-π/3)+2sin5/3π+3sin2/3的值等于?sin(-π/
sin(-π/3)+2sin5/3π+3sin2/3的值等于?
sin(-π/3)+2sin5/3π+3sin2/3的值等于?
sin(-π/3)+2sin5/3π+3sin2/3的值等于?
sin(-π/3)+2sin5/3π+3sin2/3
=-√3/2+2(-√3/2)+3√3/2
=0
后面的3分之2有π么
sin5π/3=sin(2π-π/3)
sin(-π/3)+2sin5/3π+3sin2/3的值等于?
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