The impulse response of a system is $h\left(t\right)=tu\left(t\right)$.For an input $u(t-1)$ , the output is
For a periodic signal $v\left(t\right)=30\mathrm{sin}100t+10\mathrm{cos}300t+6\mathrm{sin}(500t+\mathrm{\pi}/4)$, the fundamental frequency in rad/s is
A function is given f(t) = sin^{2}t + cos2t. Which of the following is true?