ssthakur1@sheffield.ac.uk Posted October 29, 2018 Share Posted October 29, 2018 I am trying to find the maximum and minimum peaks of a function which goes as: y=x1 cos(f1+ teta) + x2 cos(2*f1); The peak values are straightforward for cases where the frequencies are equal or when they are non-multiples. I am having trouble to quantify the maximum and minimum values of 'y'. Note: teta, x1 and x2 all these vary from time to time. I am therefore looking for a generalised expression (accuracy <5%). Thanks in advance. Link to comment Share on other sites More sharing options...
mathematic Posted October 30, 2018 Share Posted October 30, 2018 I'll assume f1 should be f1t. Elementary calculus gives x1sin(f1t+teta)+2x2sin(f2f1t)=0 as the equation to be solved for t. Good luck!. Link to comment Share on other sites More sharing options...
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