Use the power-reducing identities to rewrite the expression that does not contain trigonometric functions of power greater than 1.sin x (2 cos2 x - 1)
A. sinx cos 2x
B. sin 2x
C. cos 2x
D. cos x sin 2x
Answer: A
Mathematics
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Solve the system of equations by substitution.3x + y = 132x - 7y = 24
A. (5, 2) B. (-5, -2) C. (-5, 2) D. (5, -2)
Mathematics
Find the first term and the common ratio of the geometric sequence.an = 3
n
A. a1 = - 
, r = 
n
B. a1 = - 
, r = 
C. a1 = 
, r = 3
D. a1 = 
, r = 
Mathematics
Solve.A contractor finds that it takes Sam Tockett 9 hours to construct a wall of a certain size. It takes Jim Lowell 6 hours to construct the same wall. How long would it take if they worked together?
A. 1 hr
B. 15 hr
C. 3
hr
D. 
hr
Mathematics
Find the volume of the solid generated when the indicated region is revolved about the specified axis; slice, approximate, integrate.x-axis
A. 9?
B. 
?
C. 
?
D. 
?
Mathematics