Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = (cos x)x
A. (cos x)x (ln cos x - x tan x)
B. ln x(cos x)x - 1
C. ln cos x - x tan x
D. (cos x)x (ln cos x + x cot x)
Answer: A
Mathematics
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Find n(A) for the set.A = {800, 801, 802, . . ., 8000}
A. n(A) = 4 B. n(A) = 7201 C. n(A) = 8000 D. n(A) = 7200
Mathematics
Multiply.× 
A. 708.883 B. 708.993 C. 708.983 D. 708.994
Mathematics
Find the vertices of the hyperbola.(y - 4)2 - 36(x + 3)2 = 36
A. (-3, -2) and (-3, 10) B. (-2, -1) and (-2, 11) C. (3, -6) and (-3, 6) D. (3, -10) and (3, 2)
Mathematics
Find the median. Round to the nearest tenth when necessary.19.2, 19.3, 18.4, 18.5, 19.2, 18.3
A. Median = 19.2 B. Median = 18.5 C. Median = 37.7 D. Median = 18.85
Mathematics