Differentiate.f(x) = tan(cos x)
A. tan(-sin x)
B. -sin x sec2(cos x)
C. tan(cos x) sec(cos x)
D. sec2 (cos x)
E. none of these
Answer: B
Mathematics
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Solve the quadratic equation by completing the square.x2 + 3x - 9 = 0
A. {-3 - 3
, -3 + 3
}
B. 
C. 
D. 
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Use inductive reasoning to find the 6th, 10th and nth terms in the following sequence: 0, 3, 8, 15, 24, . . .
What will be an ideal response?
Mathematics
Is the following correspondence a function??
A. Yes B. No
Mathematics
Solve the problem using the quadratic formula.The cumulative number (in thousands) of deaths from a certain disease from 2000 to 2010 may be modeled by 
where x = 0 corresponds to 2000, x = 1 to 2001, etc. Use the formula for f(x) to estimate symbolically the year when the total number of deaths reached 110 thousand.
A. 2009 B. 2007 C. 2008 D. 2006
Mathematics