the potential difference across a circuit is given by the complex number

V = 40 + j35 volts

& the current is given by the complex number

I = 6 + j3 amps

1) Sketch the appropriate phasors on an Argand diagram

2) Find the phase difference (the angle) between the phasors for Voltage V and Current I

3) Find the power, watt, given power = |V| x |I| x cos(angle)

dont know where to begin for these questions please help me