Calculate the first four non-zero terms of the Fourier series expansion for the periodic function defined below g(x) : g(x) =sin(x) +cos(2x)
a) a0=0,a1=1,a2=0,a3=0
b) a0=1,a1=0,a2=1,a3=0
c) a0=1,a1=1,a2=0,a3=0
d) a0=0,a1=1,a2=1,a3=0