Either is acceptable and understandable. However, "captain" (without the "the") is a more informal way of speaking. But, always capitalize formal names (and space): so write this as Mr.
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hanuman_2000Hello,1. Mr. cook is captain of our team.2. Mr.Cook is the captain of our team.shall we use 'the' in this context?Thanks.'the' is optional. If you omit it, you focus on "captain" as a title.