Answer
The equivalent trigonometric form is $\sqrt{2}(cos 315^\circ + i sin315^\circ)$.
Work Step by Step
$1 - i$ is at $315^\circ$ with absolute value $\sqrt{1^2 + (-1)^2} = \sqrt{2}$, the equivalent trigonometric form is $\sqrt{2}(cos 315^\circ + i sin315^\circ)$.
