Yup I kept it all true tracks / headings in the example above to keep it simple.
Of course when dealing with runway crosswinds / headwinds one can use a calculator (I did in the exam and its MUCH quicker).
Headwind is a function of cos (cos 0 degrees is 1).
Crosswind is a function of sin (sin 90 degrees is 1).
eg.
Crosswind = Wind speed * sin 70 degrees difference
Headwind = Wind speed * cos 70 degrees difference