Evaluate without using a calculator by using ratios in a reference triangle.cos 210°
A. 
B. 
C. - 
D. - 
Answer: C
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Let B denote the price of a bag of groceries at time t. It is found that 
is positive at 
. What can be concluded about the graph of B at the point
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??
A. The price of groceries reaches a maximum at .
B. The price of groceries reaches a minimum at .
C. The price of groceries is increasing at .
D. The price of groceries is decreasing at .
Write out all the terms of the series.
A. 
+ 
+ 
+ 
+ 
B. 
+ 
+ 
+ 
+ 
C. 
+ 
+ 
+ 
+ 
D. 
+ 
+ 
+ 
+ 
Find the exact value of y, or state that y is undefined.y = cos-1 
A. 
B. - 
C. 
D. 
Perform the indicated operation(s). Simplify if possible.
+ 
A. 
B. 
C. 
D. 