Its only simple if you know the answer...
Nevermind, thank you

 

These are my latest workings, not sure at the beginning of each segment if I should be adding 314.2 as a cycle or not?

 

Hi,
Ref your PM,
Attached is a marked up version of your pdf work sheet.

Make sure that your calculator is set for Radians NOT Degrees.

Work thru the sheet and compare your answers.

Calculate each part of the equation.

E

EDIT:
Added an LTS image showing the 3 part frequencies and a composite plot.

It should help you visualise the problem.