Find the unit vector having the same direction as v.v = -3i + j
A. u = - 
i + 
j
B. u = - 
i - 
j
C. u = -3
i + 
j
D. u = - 
i + 
j
Answer: A
Mathematics
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Evaluate the spherical coordinate integral.
A. 
B. 10
C. 10?
D. 
?
Mathematics
Using the Superposition Theorem, find IR3 and VR4 .
E1 = 15.0 V
E2 = 35.0 V
R1 = 10 Kê
R2 = 10 Kê
R3 = 25 Kê
R4 = 15 Kê
Mathematics
Solve the equation.
+ 
= - 
A. 
B. 
C. 
D. 
Mathematics
Solve the equation for -2? ? x ? 2?.csc x = 1
A. -?, ?
B. -2?, 0, 2?
C. - 
, 
D. none
Mathematics