Question

Express the complex number in trigonometric form.

-4

Answer 1

\(\large { -4\implies
\begin{array}{ccllll}
-4&+0i\\
a&b
\end{array}\to
\begin{array}{llll}
a=-4\\
b=0
\end{array}\qquad r[cos(\theta)+isin(\theta)]
\\ \quad \\ \quad \\
r=\sqrt{a^2+b^2}\qquad tan(\theta)=\cfrac{b}{a}\implies \theta=tan^{-1}\left(\cfrac{b}{a}\right)
}\)