Find the derivative.p = 
A. 
= sec2 q + 1
B. 
= - csc q cot q
C. 
= sec2 q
D. 
= sec q tan q
Answer: C
Mathematics
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Find the gradient field F of the function f.f(x, y, z) = 
A. F = 
i + 2yj + 2zk
B. F = 
(x2 + y2 + z2)i + 
j + 
k
C. F = 
i + 
j + 
k
D. F = 
i + 
j + 
k
Mathematics
Find equations for the tangent plane and the normal line to the surface with equation x² + 9y² + 9z² = 22 at the point P(2, 1, 1).
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Mathematics
Write the ratio as a percent.
A. 58% B. 5.8% C. 31% D. 29%
Mathematics
The general term of a sequence is given. Find the indicated partial sum.a1 = 4, an = an - 1 + 6 for n ? 2; S5
A. 80 B. 100 C. 85 D. 55
Mathematics