← Polar and rectangular formsQuestion 2 of 37 · AS91577

A

A Christchurch electronics technician models the impedance of a filter as z = 3 − 4i ohms.

Only your final answer is marked, not your working.

A(a) Express z in polar form, r cis θ, with −π < θ ≤ π. Give θ in radians, exactly or to 3 significant figures.