The voltage across the terminals of a circuit is V(t) = 30 + 20 cos(60 t +

The voltage across the terminals of a circuit is
V(t) = 30 + 20 cos(60 πt + 45°)
+ 10 cos(60π - 45°) V
If the current entering the terminal at higher potential is
I(t) = 6 + 4 cos (60 πt - 45°)
+ 10 cos(60 πt - 45°) V
find:
(a) The rms value of the voltage,
(b) The rms value of the current,
(c) The average power absorbed by the circuit.