Question

Precalculus: Express the complex number in trigonometric form.

-2. plz really need help. no explanation is necessary

Answer 1

2∠180° . . . or . . . 2(cos(180°) +i·sin(180°))

Explanation:

-2 is 2 units along the negative real axis. The direction of that from the origin is at an angle of 180° measured from the positive real axis. So, the magnitude is 2 units and the angle is 180°.