Question: New to Maple, not much of a clue!

How would I express cos(2x+(Pi/6)) in the form Acos(2x)+Bsin(2x)? Also I have plotted y=(x^2-4x+5)/(x-2) I need to mark vertical, horizontal or oblique asymptotes with a dashed line. Determine the location and nature of any turning points. Does anyone know how to do this? Please help, thank you. Chloe
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