The frequency of a sinusoidal alternating current is 50 Hz, the effective value is 5 A, and the initial phase is - II / 2 I hope the answer is more detailed

The frequency of a sinusoidal alternating current is 50 Hz, the effective value is 5 A, and the initial phase is - II / 2 I hope the answer is more detailed

u=5*1.414*sin(100π-π/2)