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Press `` to copy this result to the screen. Then, reactivate the Equation
Writer to calculate the second integral defining the coefficient c
n
, namely,
Once again, replacing e
inπ
= (-1)
n
, and using e
2inπ
= 1, we get:
Press `` to copy this second result to the screen. Now, add ANS(1) and
ANS(2) to get the full expression for c
n
:
Pressing ˜ will place this result in the Equation Writer, where we can simplify
(@SIMP@) it to read:
Once again, replacing e
inπ
= (-1)
n
, results in