Explanation:
A formula that is used to find the time period of a cyclic phenomena based on the frequency as follows :
![T=(1)/(f)](https://img.qammunity.org/2021/formulas/physics/college/bpsn5ir40keugm3jeomv8xdunzw89kls7c.png)
f is frequency
We need to solve the formula for f in terms of T. Cross multiplying the above formula such that :
![T{\cdot} f=1\\\\f=(1)/(T)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/w0rgde1fkcsy6x2lbsi4typmwvsyfm1mly.png)
Therefore, this is the required explanation.