A periodic function f(t) has a Fourier series -(-1)" +1) 00 F(t) = 1+ cos(nat) +E (n-2) sin(nnt). n n=1 n=1 Select the option that gives first few terms of the Fourier series up to and including terms involving 3nt. Select one: 1 1+ cos(2nt) + sin(rt) + sin(2nt) + 1 sin(3nt) O 1+2 cos(2nt) + sin(rt) + sin(2nt) + sin(3nt) O 1+2 cos(rt) + 2 cos(3nt) + sin(at) + sin(2rt) + sin(3nt) 1 1 1 1+ cos(t) +cos(3rt) + sin(rt) + sin(2rt) + sin(37t) cos(3nt) + sin(Tt) + sin(2nt) + sin(3t) 3 4 9 1 1 1+ 2 cos(rt) + cos(3nt) + sin(rt) + sin(2nt) + sin(3rt) 4 9

Q: 2(3y-5)=34

A: We will see the ans in next step

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A:

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A: Substitute 25 for A , 4 for a and 18 for d in A=a+d(n-1).

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A: