Question

Express the complex number in trigonometric form.

-2

2(cos 90° + i sin 90°)
2(cos 0° + i sin 0°)
2(cos 180° + i sin 180°)
2(cos 270° + i sin 270°)

Answer 1

\(-2 = -2(1) + i(0)\)
\(-2 = -2(\cos\theta)+i(\sin\theta)\)

\[\cos \theta = 1 , \sin \theta = 0\]

Find the relavant angle - \(\theta\)

Answer 2

I don't know how to ....