Let the pairs of vectors a-b- and c-d- each determines a plane- then the planes are parallel if

The correct option is C (a⃗×b⃗)×(c⃗×d⃗)=0⃗ Normal vector to plane a̅, b̅ is given by, a̅×b̅ And normal vector to plane c̅, d̅ is given by ...

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Let the pairs...

Question

Let the pairs of vectors $\to a, \to b$ and $\to c, \to d$ each determines a plane, then the planes are parallel if

(\to a \times \to c) \times (\to b \times \to d) = \to 0

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(\to a \times \to c) . (\to b \times \to d) = \to 0

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(\to a \times \to b) \times (\to c \times \to d) = \to 0

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(\to a \times \to b) \cdot (\to c \times \to d) = \to 0

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