I keep getting these answers wrong, which part is wrong id love some help.
For mathqs1......Q2 i have also tried 18 and 27
For mathqs2..... Q5 i have also tried 0
Please view attached cheers
For question 5 you want to evaluate:
$\displaystyle a_n=\frac{1}{\pi}\int_{-\pi}^{\pi}f(t) \cos(nt)\;dt = \frac{2}{\pi} \int_{0}^{\pi}f(t) \cos(n t)\;dt$
The last term is because $\displaystyle f(t)$ is the even extension of $\displaystyle f(t)$ defined on $\displaystyle (0,\pi)$.
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