How can i change this paragraph into my own words?

So far, all of the values for the sinusoidal function have been decided and whether the graph consists of a sin or a cos, now needs to be considered. The cos function would result in the graph to start at either the maximum or the minimum point. Alternatively, the sin function always begins on the same point as the vertical shift. For these reasons, the data is a cos function. It is also a negative graph, as the point in the cycle where the graph begins is a minimum. It is necessary now to substitute all values in the equation: