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Home > CALC > Chapter 2 > Lesson 2.1.1 > Problem 2-11
2-11.
Expand and evaluate each of the following sums.
___ or, because of the symmetry of
, this problem can be simplified as:
Think about the symmetry of odd functions such as
.
Justify why the sum fromto will be .
Unfortunately,
does not have symmetry across the -axis. We have to expand and evaluate all terms.
_______
sin
is an odd function. Consider symmetry before evaluating.