Complete the identity.sin ? [sin (2?) + sin (4?)] = ?
A. 
cos ? [cos (2?) + cos (4?)]
B. 
cos ? [cos (2?) - cos (4?)]
C. cos ? [cos (2?) + cos (4?)]
D. cos ? [cos (2?) - cos (4?)]
Answer: D
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Solve the problem.To the nearest dollar, the average tuition at a public four-year college was 
the year Jane enrolled there and 
when her sister entered college 3 years later. Find the average yearly increase in tuition from the year Jane began college to when her sister began (to the nearest dollar per year).
A. tuition increased $68 per year B. tuition decreased $68 per year C. tuition increased $85 per year D. tuition increased $79 per year
Solve the given equation.
Provide an appropriate response.Discuss the graph of the equation 
+ 
= 1 if a = b.
What will be an ideal response?
Use the square root property to solve the equation.4x2 - 44 = 0
A. {-11, 11}
B. {-
, 
}
C. {22}
D. {12}