trigonometric functions
On your calculator sketch the graph of y = sin x with the dervative function turned on. The derived function if plotted is equal to the cosine function. That is, if y = sin x, then dy/dx = cos x. To differentiate trig functions use the chain rule to work the outside and the inside of the brackets.
trig rules
The Examination comes with this rule book which lists all the required formula for the exam. This is a table version of the above formula.