Answer
$ A=-\frac{2}{\pi},B=4,C=0,D=\frac{1}{\pi}$
Work Step by Step
Function $ y=-\frac{2}{\pi}sin\frac{\pi}{2}t+\frac{1}{\pi}$
$ A=-\frac{2}{\pi},B=4,C=0,D=\frac{1}{\pi}$
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