Consider the signal f(t)=1+2cos(πt)+3sin(2πt/3)+4cos(πt/2 + π/4), where t is in seconds. Its fundamental time period, in seconds, is

For a periodic signal v(t) = 30 sin100t + 10 cos300t + 6 sin(500t + π/4), the fundamental frequency in rad/s is

For a periodic signal v(t) = 30 sin100t + 10 cos300t + 6 sin(500t + π/4), the fundamental frequency in rad/s is