Question

If Asinx + Bcosx = ksin(k-a) show that k=sqrt(A^2+B^2) and that tan a = B/A

Answer 1

subtraction or addition angle formula gives it
it is rather a pain to write but easy enough to understand
try for example
http://www.youtube.com/watch?v=G5LEOplnBxg

Answer 2

Oh okay, i think i get it now, thanks heaps! :) Trig. Functions confuses me :p

Answer 3

yw