Step 1:

The complex number is $\"\"$ .

Find trignometric form.

Trignometric form $\"\"$ .

Find $\"\"$ .

General form of trignometric identity is $\"\"$ .

Substitute $\"\"$ in the above equation.

$\"\"$ \ \

$\"\"$

Find $\"\"$ .

$\"\"$ ,when $\"\"$ .

Substitute $\"\"$ in the above equation. \ \

$\"\"$ \ \

Substitute $\"\"$ and $\"\"$ in the trignometric form.

$\"\"$

Solution:

Trignometric form is $\"\"$