f(t) = sin(πt) - 2cos²(3πt) + 3sin(5πt) I want coefficients of sinusoidal signal with Amplitude and phase function.
a) 1, 0°; -2, -90°; 3, 0°
b) 1, 90°; -2, -180°; 3, 90°
c) 1, 0°; -2, 180°; 3, 0°
d) 1, 90°; -2, 0°; 3, 90°