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  • $\begingroup$ Can you explain this for my question? $\endgroup$ Commented May 4, 2021 at 15:06
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    $\begingroup$ I thought I did. What do you not understand?. The phase of a sine wave should come out to be -90 degrees. If it doesn't, than something is probably wrong with your code. You expect 0 degrees but your expectation is wrong. You get 0 degrees for a cosine , not a sine $\endgroup$ Commented May 4, 2021 at 15:58