Răspuns:
y1=5sin(20t+π/6)
y1=5sin(20t+π/2)
y=Asin(ωt+Фo)
tgФo=(AsinФ1+AsinФ2)/(acosФ1+AcosФ2)=
A(sinФ1+sinФ2)/A(cosФ1+cosФ2)=
(sinФ1+sinФ2)/(cosФ1+cosФ22)
tgФo=(sinπ/6+sinπ/2)/(cosπ/6+cosπ/2)=
(1/2+1)/(√3/2+0)=3/2/(√3/2)=3/√3=√3
=>Фo=π/3
y=5sin(20t+π/3)
Explicație:
