Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.tan 390°
A. -
B. 
C. 
D. 
Answer: B
Mathematics
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Add or subtract as indicated.
- 
A. 8x
B. 
C. 8
D. 
Mathematics
Show by substitution whether the number r is a solution of the corresponding quadratic equation.x2 + 2x - 99 = 0; r = 9
A. Yes B. No
Mathematics
Find the limit algebraically.
A. 3 B. 1 C. 6 D. Does not exist
Mathematics
Solve the problem.A mother with 8 children takes 5 of them at a time to the amusement park, without taking the same 5 children more than once. What is the maximum number of times each child will go to the amusement park?
A. 35 B. 70 C. 840 D. 56
Mathematics