Give the domain, range, or period, as requested.Domain of y = sec x
A. x ? ?n
B. x = ?n
C. x ? 
+ ?n
D. -? < x < ?
Answer: C
Mathematics
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Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. x + y + z = 0 B. z = 0 C. x + y = 0 D. x - y = 0
Mathematics
Use the given information to answer the question.The preference ballots for presidency of the House Music Appreciation Club (A, B, and C) are shown. Fill in the number of votes in the first row of the preference table.
A. 
B. 
C. 
D. 
Mathematics
Find the product.
?
?
A. ?
B. ?
C. 
D. 
E. ?
Mathematics
Find the domain of the function.f(x) = ln 
A. x > 0 B. x > 9 C. x > 1 D. x > -9
Mathematics