来自帅青红的问题
【用三角比诱导公式求值:cos(5π/3-θ)+sin(4π/3-θ)+cos(4π/3+θ)+用三角比诱导公式求值:cos(5π/3-θ)+sin(4π/3-θ)+cos(4π/3+θ)+sin(2π/3+θ)】
用三角比诱导公式求值:cos(5π/3-θ)+sin(4π/3-θ)+cos(4π/3+θ)+
用三角比诱导公式求值:cos(5π/3-θ)+sin(4π/3-θ)+cos(4π/3+θ)+sin(2π/3+θ)
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2020-12-1807:24