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Answer:
[tex]\alpha =\dfrac{\omega_f-\omega_i}{t}[/tex]
Explanation:
The angular acceleration is given by the relation as follows :
[tex]\alpha =\dfrac{\omega_f-\omega_i}{t}[/tex]
Where
[tex]\omega_i\ and\ \omega_f[/tex] are the initial and final angular velocities
t is time
The SI unit of angular acceleration is rad/s². Hence, this is the required solution.