To find the missing angle \( \theta \) using inverse cosine, you need the cosine value. However, you haven't provided that value. Could you provide the cosine value or the context (e.g., lengths of sides in a right triangle) needed to calculate it?
If you have a specific cosine value (like \( \cos(\theta) = x \)), you can find the angle using:
\[ \theta = \cos^{-1}(x) \]
Please provide additional details so I can assist you further.
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