$\"\"$

Observe the graph, the complex number is $\"\"$ .

The trigonometric form of complex number $\"\"$ is $\"\"$ .

The absolute value (modulus) of $\"\"$ is $\"\"$ .

The reference angle $\"\"$ is given by $\"\"$ .

The value of $\"\"$ and the complex number $\"\"$ lies in real axis(quadrant III).

So, the angle is $\"\"$ .

The trigonometric form of complex number $\"\"$ is $\"\"$ . $\"\"$

The trigonometric form of complex number $\"\"$ is $\"\"$ .