Step 1: Recall the definition of sample space.
The sample space is the set of all possible outcomes of an experiment. Step 2: Apply it to coin tossing.
When one coin is tossed, there are two possible outcomes: - Head (H) - Tail (T) Step 3: Represent the sample space.
\[ S = \{H, T\} \] Step 4: Conclusion.
Thus, the sample space for tossing one coin consists of two outcomes — Head and Tail.
Final Answer: \[ \boxed{S = \{H, T\}} \]