Perform the indicated operation and, if possible, simplify.
? 
A. 
B. 1
C. 
D. 
Answer: C
Mathematics
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Solve the proportion. Write the solution as a simplified proper fraction or mixed number when applicable.
= 
A. 2
B. 
C. 
D. 3
Mathematics
Find the potential function f for the field F.F = - 
i + 
j - 
k
A. f(x, y, z) = 
- 
+ 
+ C
B. f(x, y, z) = 
+ C
C. f(x, y, z) = ln (y - x - z) + C
D. f(x, y, z)= ln 
+ C
Mathematics
Solve the given equation for x.y = 7 cos-1 
A. x = 4 cos 7y
B. x = 4 sin 7y
C. x = 7 cos 
D. x = 4 cos 
Mathematics
A point on the terminal side of an angle ? is given. Find the exact value of the indicated trigonometric function of ?.(- 
, 
)Find cos ?.
A. - 
B. - 
C. 
D. 
Mathematics