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cos
θ
=
e
j
θ
+
e
−
j
θ
2
{\displaystyle \cos \theta ={\frac {e^{j\theta }+e^{-j\theta }}{2}}}
Z
cos
θ
=
Z
e
j
θ
+
e
−
j
θ
2
{\displaystyle Z\cos \theta =Z{\frac {e^{j\theta }+e^{-j\theta }}{2}}}
sin
θ
=
e
j
θ
−
e
−
j
θ
2
j
{\displaystyle \sin \theta ={\frac {e^{j\theta }-e^{-j\theta }}{2j}}}
Z
sin
θ
=
Z
e
j
θ
−
e
−
j
θ
2
j
{\displaystyle Z\sin \theta =Z{\frac {e^{j\theta }-e^{-j\theta }}{2j}}}
