What is the interior acute angle of the parallelogram whose sides are represented by the vectors \[\frac{1}{\sqrt{2}}\hat{i}+\frac{1}{\sqrt{2}}\hat{j}+\hat{k}\] and \[\frac{1}{\sqrt{2}}\hat{i}-\frac{1}{\sqrt{2}}\hat{j}+\hat{k}\]?

What is the interior acute angle of the parallelogram whose sides are

1.	What is the interior acute angle of the parallelogram whose sides are represented by the vectors \[\frac{1}{\sqrt{2}}\hat{i}+\frac{1}{\sqrt{2}}\hat{j}+\hat{k}\] and \[\frac{1}{\sqrt{2}}\hat{i}-\frac{1}{\sqrt{2}}\hat{j}+\hat{k}\]?
A.	\[60{}^\circ \]
B.	\[45{}^\circ \]
C.	\[30{}^\circ \]
D.	\[15{}^\circ \]
Answer» B. \[45{}^\circ \]

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What is the interior acute angle of the parallelogram whose sides are represented by the vectors \[\frac{1}{\sqrt{2}}\hat{i}+\frac{1}{\sqrt{2}}\hat{j}+\hat{k}\] and \[\frac{1}{\sqrt{2}}\hat{i}-\frac{1}{\sqrt{2}}\hat{j}+\hat{k}\]?

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