Multiply and simplify.(
+ 
)(
- 
)
A. 16
B. 13 - 2
C. 10
D. 13 - 2
Answer: C
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Use integration by parts to establish a reduction formula for the integral.
, n ? 1
A. 
= 
cotn-1 x - 
B. 
= 
cotn-2 x - 
C. 
= - cotn-1 x + 
D. 
= 
cotn-1 x + 
Solve the problem.The position (in centimeters) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. How fast is the object moving when it is moving fastest?
A. A
cm/sec
B. A cm/sec
C. 
cm/sec
D. A
cm/sec
1.1379 to the nearest tenth
A. 1.1 B. 1.14 C. 1.2 D. 1.0
Find the vertices and foci of the given ellipse.3x2 + 5y2 = 15
A. Vertices: (
, 0) and (-
, 0);
Foci: (
, 0) and (-
, 0)
B. Vertices: (0, 
) and (0, -
);
Foci: (0, 
) and (0, -
)
C. Vertices: (5, 0) and (-5, 0);
Foci: (2, 0) and (-2, 0)
D. Vertices: (0, 
) and (0, -
);
Foci: (0, 
) and (0, -
)