1.
Find the product
. Express the result in rectangular form.
A.
-6 +
i
B.
-6
C.
6
i
D.
6
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.
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
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 + 14.91
i
B.
-8.83 + 12.13
i
C.
-14.50 - 3.83
i
D.
-0.87 + 7.95
i
Hint
5.
Find the product
. Express the solution in rectangular form.
A.
3
B.
C.
-3
D.
0
Hint