Question

Express the complex number in trigonometric form.

3 - 3i

three times the quantity cosine of five pi divided by four plus i times sine of five pi divided by four
three square root two times the quantity cosine of seven pi divided by four plus i times sine of seven pi divided by four
three times the quantity cosine of seven pi divided by four plus i times sine of seven pi divided by four
three square root two times the quantity cosine of five pi divided by four plus i times sine of five pi divided by four

Answer 1

its not a

Answer 2

its b