1.   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

  2.   In a circuit with alternating current, , where E represents voltage, I current, and Z impedance. Determine the voltage in a circuit where there is a current of amps and an impedance of ohms.
    A. B.
    C. D.
    Hint

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

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

  5.   Find the quotient Express the answer in rectangular form, approximating a and b to the nearest hundredth.
    A. -2.40 - 2.40i B. 0.19 - 0.23i
    C. 2.14 + 2.64i D. 2.14 - 2.64i
    Hint