共50条信息
已知向量\(\overrightarrow{a}=(3,4)\),\(\overrightarrow{b}=\left(\sin α,\cos α\right) \)且\(\overrightarrow{a} /\!/\overrightarrow{b}\),则\(\tan \alpha \)等于\((\) \()\)
已知向量\( \overset{→}{a}=(1,3), \overset{→}{b}=(2,m) \),若\( \overset{→}{a} \)与\( \overset{→}{a}+2 \overset{→}{b} \)平行,则\(m\)的值为\((\) \()\)
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