Why do I get TrigExpand::obslt and Needs::nocont errors while loading Time Series?

When you load Time Series under Mathematica 3.0, you will see the following error messages.

In[1]:=

These error messages are generated because Time Series attempts to load the package Algebra`Trigonometry`. The functionality of this package has been incorporated into the Mathematica kernel. Additionally, the command ComplexToTrig has been renamed to ExpToTrig. There are two ways to work around this problem.

First, you can define the function and ignore the warning messages.

Second, you can edit the TimeSeries.m file. Delete the reference to Algebra`Trigonometry` in the BeginPackage statement, and rename the two instances of ComplexToTrig to ExpToTrig.

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