Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
edr1c
Group Title
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
edr1c Group Title
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

This Question is Closed

edr1c Group TitleBest 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_Derp Group TitleBest 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

edr1c Group TitleBest 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
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.