The complex numbers are and .

The polar form of a complex number  is .

Where , and  .

Here  is the magnitude of the complex number and  is argument of .

Compare the complex number with  .

Here and .

Magnitude of :

.

Substitute , and in , .

and

and .

Since the cosine function negative and sine function positive in second quadrant, the lies in second quadrant.

The angle satisfies both the conditions is .

Substitute and in trigonometric form. \ \

.

The trigonometric form of is .

Compare the complex number with  .

Here and .

Magnitude of :

.

Substitute , and in , .

and

and .

Since both the angles are negative, the lies in third quadrant.

The angle satisfies both the conditions is .

Substitute and in trigonometric form. \ \

.

The trigonometric form of is .

Use product of complex numbers in polar form : .

.

.