Use integration by parts to establish a reduction formula for the integral.
, n ? 1
A. 
= 
cotn-2 x - 
B. 
= 
cotn-1 x - 
C. 
= - cotn-1 x + 
D. 
= 
cotn-1 x + 
Answer: B
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Perform the matrix operation.Given B = 
, find (-2)B.
A. 
B. 
C. 
D. 
In a school survey, students showed these preferences for instructional materials. Answer the question.
About how many students would you expect to prefer TV in a school of 700 students?
A. About 140 students B. About 12 students C. About 84 students D. About 126 students
Answer the question.Which of the following statements is true concerning the graph of f(t) = cos t?
A. The graph is symmetric about the y-axis. B. The graph contains no symmetry. C. The graph is symmetric about the x-axis. D. The graph is symmetric about the origin.
Round the following to the nearest ten, nearest hundred, and nearest thousand.9671
A.
| Ten | 9670 |
| Hundred | 9600 |
B.
| Ten | 9680 |
| Hundred | 9600 |
| Thousand | 9000 |
C.
| Ten | 9670 |
| Hundred | 9700 |
D.
| Ten | 9680 |
| Hundred | 9700 |