$\"\"$

The DeMoivres Theorem : if $\"\"$ , then $\"\"$ .

The complex numbers $\"\"$ .

First convert the complex number into trigonometric form. \ \

The trigonometric form is $\"\"$ .

Let, $\"\"$ .

Compare the complex number with a + ib.

a = $\"\"$ and b = 2.

$\"\"$

a = $\"\"$ > 0 so, the angle is :

$\"\"$

The trigonometric form of $\"\"$ .

$\"\"$

$\"\"$ (Using DeMoivres Theorem)

$\"\"$

$\"\"$ .

$\"\"$

The result is $\"\"$ .