If a→ , b→ , c→ , d→ are coplainer vector then show that ( a→×b→)×(c→×d→) = 0 . .

If $\vec{a}, \vec{b}, \vec{c}, \vec{d}$ are coplainer vector then show that $(\vec{a} \times \vec{b}) \times (\vec{c} \times \vec{d}) = 0 .$ .

Matching exercise

Match the items on the right to the items on the left.

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STEP 6