Answer
The equivalent trigonometric form of $7 - 24i$ is $25cis286.26^\circ$ or $25(cos286.26^\circ + isin286.26^\circ)$.
Work Step by Step
For $7 - 24i$, the absolute value is $\sqrt{7^2 + (-24)^2} = 25$ and $\theta = arctan(\frac{-24}{7}) = 286.26^\circ$, since $7 - 24i$ is in the 4th quadrant.
Therefore, the equivalent trigonometric form of $7 - 24i$ is $25cis286.26^\circ$ or $25(cos286.26^\circ + isin286.26^\circ)$.
