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chapter5.4r
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1995-04-09
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135
à 5.4ïReview
äïPlease answer the following questions about complex
êênumbers.
â
êêïNot available in the Review Section.
éS
êêïNot available in the Review Section.
1
êêêïAddï7 + 3iïand -8 + 6i.
êë A)ï-15 + 9iêêè B)ï-1 + 9i
êë C)ï-1 + 3iêêëD)ïå of ç
ü
êêïNot available in the Review Section.
Ç B
2
êêëSubtractï-6 - 14iïfrom -1 + 7i.
êë A)ï-7 - 7iêêëB)ï-5 - 21i
êë C)ï5 + 21iêêëD)ïå of ç
ü
êêïNot available in the Review Section.
Ç C
3
êêëMultiplyï8 + iïandï-3 + 6i.
êë A)ï-24 + 31iêêèB)ï-30 + 45i
êë C)ï17 - 8iêêëD)ïå of ç
ü
êêïNot available in the Review Section.
Ç B
4
êêê Divideï6 - 2i by 1 + i.
êë A)ï2 - 4iêêë B)ï3 - 2i
êë C)ï-7 + iêêë D)ïå of ç
ü
êêïNot available in the Review Section.
Ç A
5ê Express √3 - i in trigonometric form.
êêêA)ï2∙(cos 60° + i∙sin 60°)
êêêB)ï2∙(cos -30° + i∙sin -30°)
êêêC)ï2∙(cos 330° + i∙sin 330°)
êêêD)ïå of ç
ü
êêïNot available in the Review Section.
Ç C
6ê Express -1 - i in trigonometric form.
êêêA)ï√2∙(cos 225° + i∙sin 225°)
êêêB)ï2∙(cos 45° + i∙sin 45°)
êêêC)ï√2∙(cos 135° + i∙sin 135°)
êêêD)ïå of ç
ü
êêïNot available in the Review Section.
Ç A
7ê Express -1 - √3i in trigonometric form.
êêêA)ï2∙(cos π/3 + i∙sin π/3)
êêêB)ï2∙(cos 240° + i∙sin 240°)
êêêC)ï√2∙(cos 120° + i∙sin 120°)
êêêD)ïå of ç
ü
êêïNot available in the Review Section.
Ç B
8ëExpress 2 + 7i in trigonometric form with the angle in
êêradian measure.
êêêA)ï3.78∙(cos 2.14 + i∙sin 2.14)
êêêB)ï8.36∙(cos 1.45 + i∙sin 1.45)
êêêC)ï7.28∙(cos 1.29 + i∙sin 1.29)
êêêD)ïå of ç
ü
êêïNot available in the Review Section.
Ç C
9ïUse De Moivre's product rule to find the product ofï√3 - i
andï-1 - iïin trigonometric form.
êêêA)ï2∙√2∙(cos 195° + i∙sin 195°)
êêêB)ï2∙(cos 115° + i∙sin 115°)
êêêC)ï2∙√2∙(cos -155° + i∙sin -155°)
êêêD)ïå of ç
ü
êêïNot available in the Review Section.
Ç A
10ïUse De Moivre's quotient rule to find the quotient of √3 - i
andï-1 - √3iïin rectangular form.
êêêA)ïi
êêêB)ï1 - i
êêêC)ï-1 - i
êêêD)ïå of ç
ü
êêïNot available in the Review Section.
Ç A
# 11ïUse De Moivre's power rule to findï(-1 - i)æ.
êêêA)ï√3 - i
êêêB)ï1/2 + √3i/2
êêêC)ï-8i
êêêD)ïå of ç
ü
êêïNot available in the Review Section.
Ç C
12ïUse De Moivre's Formula to find the square roots of i.
êêêA)ïi,ï-i
êêêB)ï1/√2 + i/√2,ï-1/√2 - i/√2
êêêC)ï1/2 + i/2,ï-1/2 - i/2
êêêD)ïå of ç
ü
êêïNot available in the Review Section.
Ç B