How do you graph #f(x)=3 - sin(x)#?
See explanation below
This would depend on what tools you have. I would use Excel, create a table with x values from for instance x=0 to x=5 with steps of 0.2
Next column would be the values of sin(x) which Excel would compute, and the third would be the values of your function f(x)=3-sin(x)
After that I would plot the values on a graph paper and draw a line through the points. You should then end up with a nice looking sine curve.
I hope the above is the answer you required.
You also have Geogebra and graphics calculators that can help you with the job.