$\"\"$

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The two vector equations are $\"\"$ and $\"\"$ .

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Find a unit vector normal to the plane.

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Let $\"\"$ and $\"\"$ be two vectors in space, $\"\"$ is orthogonal to both $\"\"$ and $\"\"$ .

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The normal vector is $\"\"$ .

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$\"\"$

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The normal vector is $\"\"$ .

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$\"\"$

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The unit vector of $\"\"$ is $\"\"$ .

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The normal vector is $\"\"$ .

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The magnitude of normal vector is $\"\"$ .

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The unit vector of $\"\"$ is $\"\"$ .

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$\"\"$

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$\"\"$ .

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The unit vector normal to the plane is $\"\"$ .

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$\"\"$

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The unit vector normal to the plane is $\"\"$ .