Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, 
< ? < ?Find cos 
.
A. 
B. - 
C. 
D. - 
Answer: A
Mathematics
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Solve the equation and check your proposed solution.40 = 4x
A. 
B. 160
C. 36
D. 10
Mathematics
Determine the amplitude or period as requested.Period of y = -3 sin (4?x + 2?)
A. 
B. 4?
C. 2
D. 
Mathematics
Find all rational zeros of f. Then (if necessary) use the depressed equation to find all roots of the equation f(x) = 0.f(x) = 2x3 - x2 - 12x + 6
A. 
B. 
C. {-2, 
, - 
}
D. {2, 
, -
}
Mathematics
Perform the indicated operation. Write the answer in simplest form. If the answer is an improper fraction, write it as a mixed number.18
+ 11
A. 28
B. 18
C. 30
D. 29
Mathematics