If the empirical formula parameters involved in a linear manner, the system of equations (3.3) is linear. Since the system of linear equations is simpler than solving nonlinear equations lot so if possible, we transform the empirical formula selected on the form so that the parameters necessary to determine participation in that an online system tinh.Chang term, if the selected function y = a + hsin (wx + f) the value w know, they
need to write a function in the form:
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