transgalactic
Banned
[latex]
I_s=I_m\cos(\omega +\phi)\\
[/latex]
[latex]
\tilde{I}=I_me^{j\phi}\\
[/latex]
[latex]
v_s=v_m\cos(\omega +\phi)\\
[/latex]
[latex]
\tilde{v}=v_me^{j\phi}\\
[/latex]
i need to find the representation of this wave
[latex]
v_s=50\sin(10t+\frac{\pi}{4})\\
[/latex]
[latex]
v_s=50\cos(\frac{\pi}{2}-10t-\frac{\pi}{4})\\
[/latex]
[latex]
v_s=50\cos(-10t+\frac{\pi}{2})\\
[/latex]
so the phasor should look like
[latex]
\tilde{v}=50e^{j\frac{\pi}{2}}\\
[/latex]
why the correct answer is:
[latex]
\tilde{v}=50e^{-j\frac{\pi}{2}}\\
[/latex]
I_s=I_m\cos(\omega +\phi)\\
[/latex]
[latex]
\tilde{I}=I_me^{j\phi}\\
[/latex]
[latex]
v_s=v_m\cos(\omega +\phi)\\
[/latex]
[latex]
\tilde{v}=v_me^{j\phi}\\
[/latex]
i need to find the representation of this wave
[latex]
v_s=50\sin(10t+\frac{\pi}{4})\\
[/latex]
[latex]
v_s=50\cos(\frac{\pi}{2}-10t-\frac{\pi}{4})\\
[/latex]
[latex]
v_s=50\cos(-10t+\frac{\pi}{2})\\
[/latex]
so the phasor should look like
[latex]
\tilde{v}=50e^{j\frac{\pi}{2}}\\
[/latex]
why the correct answer is:
[latex]
\tilde{v}=50e^{-j\frac{\pi}{2}}\\
[/latex]