Trigonometric Functions (id: 0d1c43946)

本题目来源于试卷: Trigonometric Functions，类别为 IB数学

[问答题]
Let f(x)=3 $\sin (\pi x)$+1 .
1. Write down the amplitude of f .
2. Find the period of f .
3. On the following grid, sketch the graph of f , for 0 $\leq x \leq 4 $.

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