Without using a calculator, determine the value of the trigonometric function or state that the value is undefined.tan 
A. 1
B. -1
C. undefined
D. 0
Answer: C
Mathematics
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Write as a decimal.0.21%
A. 0.0031 B. 0.0021 C. 0.21 D. 0.021
Mathematics
Solve the system by the addition method, if possible. If a solution exists, give the value of x.
?
?
A. -9 B. -12 C. -2 D. -6 E. no solution
Mathematics
Use the graph to determine whether the function is one-to-one.
A. No B. Yes
Mathematics
Find the period.y = 5 sin(6?x + 4)
A. 
B. 
C. 6?
D. 
Mathematics