\(Y=A \sin \left(\omega t +\phi_0\right)\) is the time-displacement equation of a SHM. At \(t=0\) the displacement of th…

\(Y=A \sin \left(\omega t +\phi_0\right)\) is the time-displacement equation of a SHM. At \(t=0\) the displacement of the particle is \(Y=\frac{A}{2}\) and it is moving along negative \(x\)-direction. Then the initial phase angle \(\phi_0\) will be:

[JEE Main 2021, 25 Feb (Shift 2)]