Question
What is the phase of the following signals?(i) $u_1(t)=6 \sin (t+\pi / 2)$(ii) $u_2(t)=-1.5 \sin (t-\pi / 2)$(a) $\pi / 2,-3 \pi / 2$(b) $\pi / 2,-\pi / 2$(c) $-\pi / 2,-\pi / 2$(d) $+\pi,-\pi$
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