Solve the equation on the interval [0, 2?).cos2x + 2 cos x + 1 = 0
A. 
, 
B. 2?
C. ?
D. 
, 
Answer: C
Mathematics
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Solve the problem.A trough is to be made with an end of the dimensions shown. The length of the trough is to be 
long. Only the angle ? can be varied. What value of ? will maximize the trough's volume?
A. 8° B. 30° C. 52° D. 32°
Mathematics
Solve.A children's slide rises 10 feet over a horizontal distance of 8 feet. Find the slope of the slide.
A. 
B. 8
C. 
D. 10
Mathematics
Find the LCD for the given fractions.
, 
, and 
A. 30 B. 12 C. 60 D. 20
Mathematics
How many local maxima and minima does the polynomial have?
?
?
A. 2 maxima and 2 minima B. 4 maxima and 5 minima C. 1 maxima and 1 minima D. 1 maxima and 4 minima E. 4 maxima and 1 minima
Mathematics