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2cosπ/3 2sinπ/3 sin5π/4?
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cos(2兀/3)的值
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设α∈(0,π/2),若cos(α π/6)=4/5,则sin(2α π/12)的值等于
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cos3分之22兀怎么做
图片内容是:cosπ/3
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1回答 学生王某在设计计算函数f(x)=sin(3π-x)^2/sin(π-x) cos(π
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求圆p=10cos(3/π-θ)的圆心坐标?
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已知f(x)=2cos^2x √3sin2x a(a∈r),将f(x)图像右移 兀/12单位得到函
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计算sin4π/3-cosπ/6 9tanπ/3 cos3π/2 cos0
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y=asin(α-π/2) a 怎么可以变成cos函数表示呢?