Question: IT 420 Computer Systems and network the correct answers are circled in red ALL I NEED IS EXPLANATION WHY THIS ANSWER IS CORRECT PLEASE ANSWER

What is the period of the following sine wave? Frequency is in Hz. Formula: f(t)=1/tf( frequency )(sec)=1 (cycles or waves/ 1sec) What is the frequency if f(t)=4/sec 15 noints tin an and
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