Find zw or 
as specified. Leave your answer in polar form.z = 1 - iw = 1 - 
iFind 
.
A. 
(cos 15° + i sin 15°)
B. 
(cos 75° + i sin 75°)
C. 
(cos 75° + i sin 75°)
D. 
(cos 15° + i sin 15°)
Answer: A
Mathematics
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Mathematics
Find the effective rate of interest.12.75% compounded monthly
A. 13.522% B. 12.955% C. 12.873% D. 13.655%
Mathematics
Is the pair of vectors 
and 
perpendicular?
?
A. no B. yes
Mathematics
Solve the problem.A household outlet has voltage given by V = 154 sin ?t, where ? is the angular velocity of the generator in radians per second and t is time in seconds. If 
radians per second, what is the maximum voltage in this outlet?
A. 154 V B. 308 V C. 231 V D. 77 V
Mathematics