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$$$\frac{1}{3}\cdot \left\langle \cos{\left(t \right)}, - \sin{\left(t \right)}, 2 \sqrt{2}\right\rangle$$$
您的输入
计算 $$$\frac{1}{3}\cdot \left\langle \cos{\left(t \right)}, - \sin{\left(t \right)}, 2 \sqrt{2}\right\rangle$$$。
解答
将向量的每个坐标乘以该标量：
$$${\color{Fuchsia}\left(\frac{1}{3}\right)}\cdot \left\langle \cos{\left(t \right)}, - \sin{\left(t \right)}, 2 \sqrt{2}\right\rangle = \left\langle {\color{Fuchsia}\left(\frac{1}{3}\right)}\cdot \left(\cos{\left(t \right)}\right), {\color{Fuchsia}\left(\frac{1}{3}\right)}\cdot \left(- \sin{\left(t \right)}\right), {\color{Fuchsia}\left(\frac{1}{3}\right)}\cdot \left(2 \sqrt{2}\right)\right\rangle = \left\langle \frac{\cos{\left(t \right)}}{3}, - \frac{\sin{\left(t \right)}}{3}, \frac{2 \sqrt{2}}{3}\right\rangle$$$
答案
$$$\frac{1}{3}\cdot \left\langle \cos{\left(t \right)}, - \sin{\left(t \right)}, 2 \sqrt{2}\right\rangle = \left\langle \frac{\cos{\left(t \right)}}{3}, - \frac{\sin{\left(t \right)}}{3}, \frac{2 \sqrt{2}}{3}\right\rangle\approx \left\langle 0.333333333333333 \cos{\left(t \right)}, - 0.333333333333333 \sin{\left(t \right)}, 0.942809041582063\right\rangle$$$A