Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = 
, 0 < ? < 
Find sin (2?).
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Multiply and simplify. Assume that all variables represent positive real numbers.(
+ 
)(
- 
)
A. 
+ 
- 
+ 3
B. 
+ 
+ 
+ 3
C. 
+ 
+ 
- 3
D. 
+ 
- 
- 3
Mathematics
Use the choices below to fill in the blank. Choices may be used more than once or not at all.
A formula for calculating a permutation of n items taken r at a time is 
.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Find the dimensions of a rectangular enclosure with perimeter 34 ft and area 60 ft2.
A. 12 ft by 5 ft B. 10 ft by 6 ft C. 12 ft by 22 ft D. 10 ft by 24 ft
Mathematics
Graph the quadratic function.
a. 
b. 
c. 
d. 
Mathematics