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2, times, cosine, 160, times, cosine, 140, times, cosine, 100
求值
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2 \cdot -0.9396926207859083 \cdot -0.7660444431189779 \cdot -0.1736481776669303
对题中的三角函数求值
-1.8793852415718166\left(-0.7660444431189779\right)\left(-0.1736481776669303\right)
将 2 与 -0.9396926207859083 相乘,得到 -1.8793852415718166。
1.43969262078590800117836123825314\left(-0.1736481776669303\right)
将 -1.8793852415718166 与 -0.7660444431189779 相乘,得到 1.43969262078590800117836123825314。
-0.249999999999999863182868139868405239662318136142
将 1.43969262078590800117836123825314 与 -0.1736481776669303 相乘,得到 -0.249999999999999863182868139868405239662318136142。