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The angle $\theta$ between two non-zero vectors $\overline{ a }$ and $\overline{ b }$ is given by $\cos \theta=$ _____

• ✓
  $\frac{\overline{ a } \cdot \overline{ b }}{|\overline{ a }||\overline{ b }|}$
• B
  $\overline{ a } \cdot \overline{ b }$
• C
  $|\overline{ a }||\overline{ b }|$
• D
  $\frac{|\bar{a}||\bar{b}|}{\bar{a} \cdot \bar{b}}$