Trig graphs using spaghetti – PDF – A great lesson plan that develops understanding. This particular version includes student worksheets. Here is a different version and a video showing it in action.
Solving simple trig equations – Powerpoint – Using knowledge of graphs to solve simple equations.
Solving trig equations radians – Powerpoint – Solving equations where solutions are in radians
Solving further trig equations – Powerpoint – Solving equations involving the tan function. Also method for trickier equations.
Using identities – Powerpoint – Using identities to solve equations.
The videos below are by ExamSolutions. Visit his website here for more videos.
Trig quadrant rule
Solving trig equations
Trig identities and proof
Trig identities and equations