Evaluate the expression (155 – j63) – (55 – j10) and express the answer in polar coordinates.

The current in the circuit below is:

Evaluate the expression (4 + j5) × (39 <–42°) and express the answer in polar form.

Find the sinusoidal expression of i₁

Express 100sin(ωt -90^o) in phasor form.

Find the peak-to-peak value of the waveform below.

Find the period of the waveform below.

If e = 345 sin 112t, how long does it take the waveform to complete a half cycle?

Determine the frequency at which a 2.5 μF capacitor and a 30 mH coil have the same reactance.