ReplaceAll Command

ReplaceAll( <Text>, <Text to Match>, <Text to Replace> ): Creates a new text containing the given text whose text to match has been replaced with the given text to replace.

ReplaceAll("3cos(t)+cos(2y)", "cos", "sin") creates the new text "3sin(t)+sin(2y)".

Use the FormulaText command to create a LaTeX text.

FormulaText(ReplaceAll("3cos(t)+cos(2y)", "cos", "sin")) creates the new LaTeX text "3sin(t)+sin(2y)".