A signal x(t) is given by x(t) = 2cos(9t)cos(3t). Find the
trigonometric Fourier series of x(t). Fin

A signal x(t) is given by x(t) = 2cos(9t)cos(3t). Find the
trigonometric Fourier series of x(t).

Find Wo, a0, a1, a2, a3, b1, b2, b3

I know that cos(u)cos(v) = 0.5[cos(u-v) + cos(u+v)]

x(t) = cos(12t) + cos(6t)

There is a solution manual which states that Wo = 6, and a0, a3,
b1, b2, and b3 = 0 and a1, and a2 =1 however

i am not sure how they found Wo or any of the a or b's, please
help me I will rate immediately. Thank you

Show transcribed image text A signal x(t) is given by x(t) = 2cos(9t)cos(3t). Find the trigonometric Fourier series of x(t). Find Wo, a0, a1, a2, a3, b1, b2, b3 I know that cos(u)cos(v) = 0.5[cos(u-v) + cos(u+v)] x(t) = cos(12t) + cos(6t) There is a solution manual which states that Wo = 6, and a0, a3, b1, b2, and b3 = 0 and a1, and a2 =1 however i am not sure how they found Wo or any of the a or b's, please help me I will rate immediately. Thank you