The use of sinusoidal temperature treatments in various thermal analysis techniques is briefly outlined. A generalized approach is described to cover all the techniques in which this approach is utilized. Using a computer simulation, the effect of a sinusoidal temperature variation on the thermogravimetric (TG) trace is investigated. This indicates under what conditions a modulated differential scanning calorimeter (DSC) temperature program can be operated when using a simultaneous DSC-TG unit. Other aspects of the computer simulation are noted.