1. Can't find coefficients for

i=A*sin(w*t) 0<t<T/2

i=0 T/2<t<T

i=f(t+T)

I am getting for a0=0 I think its not right.

2. Another one I can't find solution is

f(x) = cos(x) 0<x< Pi/2

f(x) = 0 Pi/2 < x < Pi

f(x) = F(x+2 )

Would appreciate any help! I am sorry I am not able to post my questions in Latex.

I hope this is OK.