Find the exact value of the expression if ? = 60°. Do not use a calculator.f(?) = cos ?Find f(?).
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Find the exact value under the given conditions.sin ? = 
, 
< ? < ?; cos ? = 
, 0 < ? < 
Find sin (? - ?).
A. - 
B. 
C. 
D. 
Mathematics
Use transformations to graph the function.y = -3 cos (x - 
)
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation. Write the answer in lowest terms.4
÷ 1
A. 3
B. 2
C. 2
D. 2
Mathematics
Simplify the expression.
A. 
B. 
C. 
- 
D. 
Mathematics