Use the given information to find the exact value of the trigonometric function.sin ? = 
, tan ? > 0
Find cos 
.
A. 
B. 
C. 
D. 
Answer: D
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Determine which of the rational functions given below has the following feature(s).x-intercepts: (4, 0) and (-3, 0), y-intercepts: none, vertical asymptotes: 
and 
horizontal asymptote: 
A. f(x) = 
B. f(x) = 
C. f(x) = 
D. f(x) = 
The graph of a function f is given. Use the graph to answer the question.For what numbers x is f(x) = 0?
A. -15, 17.5, 25 B. -15, 17.5 C. -15 D. -25, -15, 17.5, 25
Simplify the expression.
-4/3
A. - 
B. 
C. 
D. not a real number
Solve the problem.The dosage for Carboplatin Chemotherapy drugs depends on several parameters of the drug as well as the age, weight, and sex of the patient. For a male patient, the formulas giving the dosage for a certain drug are: D = A(c + 25)and c = 
,where A and x depend on which drug is used, D is the dosage in milligrams (mg), c is called the creatine clearance, y is the patient's age in years, and w is the patient's weight in kg. For a 50 year old man, find an expression for 
in terms of A and x.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
+ 25A