The convert(expr, 'expsincos') calling sequence converts all trigonometric functions appearing in the expression to sin and cos, and converts all hyperbolic trigonometric functions to exponential form. For example,  is replaced by sin(s)/cos(s).

If the optional variable x, which can be a name or a list or set of names, is specified, then only those expressions that depend (in the sense of the procedure depends) on x are affected.