Hello, list, i need a function that can exp(I*x) --> cos(x)+I*sin(x) At http://wiki.sagemath.org/symbolics/rewrite i found the rewrite function. But this function is not mentioned in Sage reference manual, and Sage 4.6.2 does not know this function: NameError: name 'rewrite' is not defined How i can exp(I*x) --> cos(x)+I*sin(x) ?
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