I'm working through some trig questions and don't understand this one:
My first thought was since , the answer would be 0, but alas, it turned out to be
Could anyone shed some light on this?
I worked through another exercise and I'm wondering if my approach is correct. It might be a bit verbose, but I'd like to be clear on my train of thought:
Am I doing anything illegal here? I can't really identify with the meaning of this, so it's a mechanical process for me, I can't visualize this at all.