Final answer:
To calculate the frequency in hertz at which the phase of the transfer function is -45 degrees, use the equation f = ω/2π, where ω is the angular frequency in rad/sec.
Step-by-step explanation:
The frequency in hertz at which the phase of the transfer function is -45 degrees can be calculated using the equation:
f = ω/2π
Where ω is the angular frequency in rad/sec and f is the frequency in hertz.
Substituting the given value of ω = 550 rad/sec, we have:
f = 550/(2π)