[Solved] Calculate the phase angle of the sinusoidal waveform z(t)=78sin(456πt+2π÷78).

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Q.	Calculate the phase angle of the sinusoidal waveform z(t)=78sin(456πt+2π÷78).
A.	π÷39
B.	2π÷5
C.	π÷74
D.	2π÷4
Answer» A. π÷39
Explanation: sinusoidal waveform is generally expressed in the form of v=vmsin(ωt+α) where vm represents peak value, ω represents angular frequency, α represents a phase difference.

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