Question: trigonometry in Maple

HI all,


I am trying to figure out in MAPLE how can I write     A * sin*theta + B* cos* theta  in the form as follows:

                                                                  A*cos*(theta +delta)


Also then I have to multiply   

                                              A*cos*(theta + phi) * A*cos(theta + wr t)

where wr = speed in rad  ,  and t = time


Your help will be really appreciated

Thanks in advance

A.Q  soton

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