The phase of a sinusoid can be related to time shift as follows: In the following parts, a...

The phase of a sinusoid can be related to time shift as follows:

In the following parts, assume that the period of the sinusoidal wave is T0 = 8 s.

(a) “When t1 = −2 s, the value of the phase is φ = π/2.” Explain whether this is True or False.

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(b) “When t1 = 3 s, the value of the phase is φ = 3π/4.” Explain whether this is True or False.

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(c) “When t1 = 7 s, the value of the phase is φ = π/4.” Explain whether this is True or False.