Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.

The exact value of is .

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the fourth quadrant.

The exact value of is .

Multiply by .

Move to the left of .

Rewrite as .

Subtract from .

Multiply by .

Convert to Rectangular Form 9(cos((3pi)/2)+isin((3pi)/2))