Find the exact value by using a half-number identity.cos 165°
A. - 
B. - 
C. 
D. 
Answer: A
Mathematics
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Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°
A. - 
B. - 
C. 
D. - 
Mathematics
Evaluate the expression x + y for the given values of the variables.x = -77, y = 0
A. -770 B. -77 C. 0 D. 77
Mathematics
Suppose 100 people counted the number of cars passing an intersection in one hour. Due to error, not all people get the same value. The mean is 75 and the standard deviation is 1. Use the sketch to find how many people report the following. 
Between 73 and 77 cars
A. 5 people B. 95 people C. 82 people D. 96 people
Mathematics
Find the domain of the logarithmic function.f(x) = log9(x + 8)
A. (9, ?) B. (-8, ?) C. (-?, 0) or (0, ?) D. (8, ?)
Mathematics