Find all real solutions. Do not use a calculator.4x3 - x + 4 = 16x2
A. 
B. {±2, 4}
C. {±1, 4}
D. 
Answer: D
Mathematics
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Solve the problem.Does the graph of the function y = 2x + 4 sin x have any horizontal tangents in the interval 
If so, where?
A. Yes, at x = 
, x = 
B. No
C. Yes, at x = 
D. Yes, at x = 
, x = 
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, sin ? > 0Find cos 
.
A. - 
B. 
C. - 
D. 
Mathematics
Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.
A. x13y10
B. 
C. 
D. 
Mathematics
Use the result ei? = cos ? + i sin ? to plot the complex number.6e(?i)/2
A. 
B. 
C. 
D. 
Mathematics