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# tangent function

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i have the formulea and i know that sinx/cosx = tanx so i divided the 2 formuleas and got this: tan x = E (x / (2n + 1)) E is sum of n = 0 to n = infinity this that correct, if not could someone show me what it should be. thanks jason

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Remember that
a + b    a   b----- != - + -c + d    c   d

Thus, you cannot divide these expressions termwise.

The correct Taylor Series for tan is shown here.