Physics - Vectors Question with Solution | TestHub

From vector produce $$\vec{A}\times (\vec{B}\times \vec{C})=(\vec{B}\cdot \vec{C})\vec{B}-(\vec{A}\cdot \vec{B})\vec{C}$$ Given that $\vec{A}\cdot \vec{B}=0,\vec{A}\cdot \vec{C}=\mathrm{C}$ then $\vec{A}\times (\vec{B}\times \vec{C})=0$ thus vector $A$ is paralles to $\vec{B}\times \vec{C}$