Originally Posted by

**AngusBurger** Now that I have it all written down, it seems so simple, but it was utter anguish getting there. Of course, as I do more of these problems I'll probably get a better feel for what I should and should not be doing, but is there any tried and tested process that I should take into account when doing this?

For instance, my first thought was to express the equation in terms of sin and cosine, so as to standardise like-terms, and that did seem to work, but I suppose my knowledge of trigonometry ultimately prevented me from seeing this through to the end without some help. I also think I seemed a bit preoccupied with flinging terms across the formula rather than focussing on its actual composition.

Or is it all just horses for courses?