1. If an AC voltage has a peak value of 160.5 V, what is the phase angle at which the instantaneous voltage is 110 V? 2. A current sine wave has a peak of 60 mA and a radian frequency of 90 rad/s. Find the instantaneous current at t = 25 ms. 3. An alternating current varying sinusoidally with a frequency of 60 Hz has an rms value of 45 A. Find the instantaneous value 0.0035 seconds after passing through maximum positive value.

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