Excel First, you need to define three main values: w (frequency) which controls how fast the wave moves, ø (phase) which sets the starting point, and A (amplitude) which determines how high and low the wave goes. In my example, we used 100 , 34.4 , and 311 . ¿how to calculate? 1.For the third column multiply the frequency by time and then for the next add the phase. 2.Convert that result into radians. 3.Apply the Sine function and then multiply it by your Amplitude.