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A sine function generally can be written as f(x) = a sin (bx + c) + d. Try to move point A in the graph below, point B appears after one cycle. The period of the cycle is units and the amplitude is a units.
Slide the values of a, b, c and d to observe the changes of graph f(x) = a sin (bx + c) + d. What can you say about the effects of these values towards the function sin (x)?