1.   Find the product . Express the result in rectangular form.
    A. 6 B. 6i
    C. -6 D. -6 + i
    Hint

  2.   Find the product 5(cos 120 + i sin 120) · 2(cos 90 + i sin 90). Express the result in rectangular form.
    A. B.
    C. D.
    Hint

  3.   Find the product . Express the result in rectangular form.
    A. 54i B. 54
    C. -54i D. -54
    Hint

  4.   Find the product 3 (cos 2.8 + i sin 2.8) · 5 (cos 0.6 + i sin 0.6). Express the answer in rectangular form, approximating a and b to the nearest hundredth.
    A. -1.63 + 14.91i
    B. -8.83 + 12.13i
    C. -0.87 + 7.95i
    D. -14.50 - 3.83i
    Hint

  5.   Find the quotient . Express the result in rectangular form.
    A. B. -6.96 - 0.76i
    C. D. 1.07 + 6.92i
    Hint