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Consider the sinusoidal voltage v(t)=20cos(100πt+60∘)V. Part G: What is the first time after t=0 that v=−20V?...

Consider the sinusoidal voltage
v(t)=20cos(100πt+60∘)V.

Part G:

What is the first time after t=0 that v=−20V? Express your answer to three significant figures and include the appropriate units.

Part I:

What is the minimum value of milliseconds that the function must be shifted to the left if the expression for v(t) is 20sin(100πt)V? Express your answer in milliseconds to three significant figures.

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