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Could someone please assits with this : An alternating voltage is represented by v = 254.56sin377t...

Could someone please assits with this :

An alternating voltage is represented by v = 254.56sin377t volt

1. Calculate the time taken from t = 0 seconds for the voltage to reach a Value of 180V for the second time (6)

2. Calculate the energy dissipated when the voltage is connected across a 9,6 ? resistor for half an hour (3)

3. Calculate the current flowing through the resistor in the form of i = Im sin(?t ±Ø) A                                                                                  (3)

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