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sin0°=0;sin90°=1;sin180°=0;sin270°=-1;sin360°=0; cos0°=1
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sin0°=0;sin90°=1;sin180°=0;sin270°=-1;sin360°=0; cos0°=1
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新世纪gpx高智能方程式sin
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计算公式正弦: sin(x)=a/c (对比斜)余弦: cos(x)=b/c (临比斜
图片内容是:sin270
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为什么 sin15°=sin45°-sin30° 是错误的? - 知乎
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具体来说,函数 $y = \sin \omega x$ 的周期为 $2\pi / \omega$.
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high-performance automatic focusing cutting head.
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sin(3π-α)=sin(2π π-α)=sin(π-α)=sin(α).

( sin(270^circ) = -1 )- ( sin(180^circ) = 0 )- ( sin(90^circ)