Vin C1 R1 Vout

RC circuits can be used to cut-off certain frequencies for AC circuits.  A low-pass filter will cut off frequencies higher than the cutoff frequency.  A high-pass filter will cut off frequencies lower than the cut-off frequency can be found using the equation: Wc = 1/RC.  Determine the cut-off frequency for the circuit below in units of Hz if C₁ = 1 µF and R₁ = 100 Ω.  I tried both 10 k rad/s and 1591.55 Hz but these seemed to be incorrect.