Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = (cos x)x
A. ln x(cos x)x - 1
B. (cos x)x (ln cos x - x tan x)
C. (cos x)x (ln cos x + x cot x)
D. ln cos x - x tan x
Answer: B
Mathematics
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Evaluate the integral by changing the order of integration in an appropriate way.
A. 
B. 
C. 
D. 
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For the function f whose graph is given, determine the limit.Find
f(x).
A. -1
B. 
C. 2
D. does not exist
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Write the inequality using interval notation. Graph the inequality.2 < x ? 6
A. [2, 6)
B. (2, 6)
C. [2, 6]
D. (2, 6]
Mathematics
Factor, if possible.x2 - 20x + 400
A. Prime polynomial B. (x + 20)(x - 20) C. (x - 20)2 D. (x + 20)2
Mathematics