Final answer:
The frequency of a sinusoidal graph is the number of complete cycles that occur in one second. It is measured in hertz (Hz) and can be calculated using the equation T = 1/f.
Step-by-step explanation:
The frequency of a sinusoidal graph refers to the number of complete cycles or oscillations that occur in one second. It is represented by the symbol 'f' and is measured in hertz (Hz). The period, represented by 'T', is the time taken to complete one full cycle. The relationship between frequency and period is given by the equation T = 1/f.
For example, if a sinusoidal graph has a frequency of 5 Hz, it means that 5 complete cycles occur in 1 second. The period would be T = 1/f = 1/5 = 0.2 seconds.