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in fourier series cos(npi) is (1)^n and sin(npi)=0,
what is cos(npi/2) and sin(npi/2)?
and when the answer is 0 when n is odd i change n into 2n, while if answer is 0 when n is even i change n into 2n1.
do i apply the same thing for npi/2?
 one year ago
 one year ago
in fourier series cos(npi) is (1)^n and sin(npi)=0, what is cos(npi/2) and sin(npi/2)? and when the answer is 0 when n is odd i change n into 2n, while if answer is 0 when n is even i change n into 2n1. do i apply the same thing for npi/2?
 one year ago
 one year ago

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edr1cBest ResponseYou've already chosen the best response.0
im always stucked here when im doing the cosine and sine series in the PDE, especially when its stepfunction with pi as interval.
 one year ago

Herp_DerpBest ResponseYou've already chosen the best response.2
\[\cos(\pi/2n) = \begin{cases} (1)^{n/2} &\;\;\;\;\;\;\text{if }n\text{ is even}\\ 0 &\;\;\;\;\;\;\text{if }n\text{ is odd} \end{cases}\]\[\sin(\pi/2n) = \begin{cases} 0 &\;\text{if }n\text{ is even}\\ (1)^{(n1)/2} &\;\text{if }n\text{ is odd} \end{cases}\]
 one year ago

edr1cBest ResponseYou've already chosen the best response.0
oh. so if i want n to represent for all n, change n into 2n if n is odd gives 0, and change n into 2n1 if n is even gives 0?
 one year ago
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