Question 1189907
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If  I  be a student and if this assignment be given to me,

I would go to the  Internet and would request there


        " online calculator for sinusoidal regression "


in  GOOGLE  search engine.



It would give some links and I would look into them.



Doing this way,  I would select one, for example,  this one


https://drive.google.com/file/d/1xs44rvhwHo0ttZc7btuhRwRhorbWTUuG/view


and quickly complete the assignment on my own.



I think,  it would be consistent with the contemporary educational methodology 

and conceptions on how to perform such job/exercises  in twenties of  XXI  century.



Pocket (graphing) calculators also provide such service.


For instructions and to get necessary skills,  see this video-lecture on YouTube


https://www.youtube.com/watch?v=wbsXheT9KqA




Or see and listen another video-lecture


https://www.youtube.com/watch?v=ivPZ0tJZkGE



Happy learning and calculating  ( ! )