Question

Find the complex amplitudes of the following sinusoidal signals. Express your final answer in polar format.
1. v(t) = 21 cos(4t - 15°) V
2. v(t) = -60 cos(30t +10°) V
3. v(t) = 120 sin(10t - 50°) V
4. v(t) = -8 sin(10t + 70°) V