Complete the identity.1 - cos(2?) + cos(6?) - cos(8?) = ?
A. 4 sin ? sin(3?) sin(4?)
B. 4 cos ? cos(3?) cos(4?)
C. 4 cos ? cos(3?) sin(4?)
D. 4 sin ? cos(3?) sin(4?)
Answer: D
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Give all possible rational zeros for the following polynomial.P(x) = 7x3 + 11x2 + 2x - 14
A. ±1, ± 
, ±2, ± 
, ±7, ±14
B. ±1, ± 
, ±2, ±7, ±14
C. ±1, ± 
, ±7, ± 
, ± 
, ± 
D. ±1, ±2, ±7, ±14
In 
, 
. Which statement is true?
A. 
is an altitude of .
B. 
is an altitude of .
C. 
is the longest side of .
D. The 3 angle-bisectors meet in the exterior of .
Use the graph to solve the problem.The population (in thousands) of one city is approximated byf(x) = 
The graph of this function is shown below. In this graph, x = 0 represents 1970. Use the graph to estimate the population of the city in 1983.
A. About 84,700 B. About 77,700 C. About 70,700 D. About 66,700
Use properties of multiplication to multiply.1 ? 40
A. 40 B. 1 C. 41 D. 0