Write the complex number in rectangular form.
cis 270°
A. -i
B. -i
C. -
D. -2i
Answer: A
Mathematics
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Find the convergence set for the given power series.
A. 1 ? x ? 9 B. 1 < x < 9 C. 4 ? x < 6 D. 2 < x < 8
Mathematics
Solve the problem.If sin x is replaced by 
and |x| < 0.5, what estimate can be made of the error?
A. |E| < 0.000003100 B. |E| < 0.000021701 C. |E| < 0.000010851 D. |E| < 0.000001550
Mathematics
Graph.
+ 
= 1
A. 
B. 
C. 
D. 
Mathematics
Find the nth term of the geometric sequence.a1 = 5, r = 5, n = 6
A. a6 = 
B. a6 = 15,625
C. a6 = 3125
D. a6 = 9,765,625
Mathematics