Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Graph the complex
number.
-3 - 6i
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2.
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Graph the complex
number.
5i
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3.
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Graph the complex
number.
1 + i
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4.
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Graph the complex
number.
6 + 2i
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5.
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Find sum of the pair of
complex numbers.
7 -
7i, -9 - 4i
a. | 11 +
2i | c. | -2 -
11i | b. | -2 - 3i | d. | -2 + 3i |
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6.
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Find sum of the pair of
complex numbers.
11 +
3i, -9
a. | 20 +
3i | c. | 20 -
6i | b. | 2 +
3i | d. | 2 - 6i |
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7.
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Find sum of the pair of
complex numbers.
-4i,
-8
a. | -8 +
4i | c. | -8 -
4i | b. | -4 -
8i | d. | -12i |
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8.
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Find sum of the pair of
complex numbers.
2i,
5i
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9.
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Find sum of the pair of
complex numbers.
2 +
6i, -4
a. | 4 | c. | 2 + 10i | b. | -2 + 6i | d. | 2 + 2i |
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10.
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Write the complex number in
rectangular form.
13.89(cos 4° + i sin 4°)
a. | 3.7 +
0.3i | c. | 1 +
13.9i | b. | 13.9 + 1i | d. | -3.7 - 0.3i |
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11.
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Write the complex number in
rectangular form.
3
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12.
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Write the complex number in
rectangular form.
9(cos
180° + i sin 180°)
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13.
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Write the complex number in
rectangular form.
9 cis
240°
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14.
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Write the complex number in
rectangular form.
 cis 270°
a. | -2i | c. | -i | b. | -i | d. | - |
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15.
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Write the complex number in
trigonometric form r(cos è + i sin è), with è in the interval [0°,
360°).
4i
a. | 4(cos 0° + i sin
0°) | c. | 4(cos
180° + i sin 180°) | b. | 4(cos 270° + i sin
270°) | d. | 4(cos 90° + i sin
90°) |
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16.
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Write the complex number in
trigonometric form r(cos è + i sin è), with è in the interval [0°,
360°).
3 - 3 i
a. | 3(cos 330° + sin i
330°) | c. | 6(cos 150° +
i sin 150°) | b. | 3(cos 330° + i sin 330°) | d. | 6(cos 300° + i sin
300°) |
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17.
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Write the complex number in
trigonometric form r(cos è + i sin è), with è in the interval [0°,
360°).
4 - 4i
a. | 8(cos 300° + i sin
300°) | c. | 8(cos 30° + i
sin 30°) | b. | 8(cos 60° + i sin 60°) | d. | 8(cos 330° + i sin
330°) |
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18.
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Write the complex number in
trigonometric form r(cos è + i sin è), with è in the interval [0°,
360°).
9 + 9i
a. | 9 (cos 45°
+ i sin 45°) | c. | 9 (cos 135° + i sin 135°) | b. | 9 (cos 225° + i sin
225°) | d. | 9 (cos
315° + i sin 315°) |
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19.
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Write the complex number in
trigonometric form r(cos è + i sin è), with è in the interval [0°,
360°).
-6 - 6i
a. | 12(cos 240° + i sin
240°) | c. | 6(cos 240° +
i sin 240°) | b. | 12(cos 180° + i sin 180°) | d. | 12(cos 290° + i sin
290°) |
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