Decide whether the equation is or is not an identity.tan 
= -cot ?
A. Not an identity
B. Identity
Answer: B
Mathematics
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Find the area of the specified region.Inside the circle r = 5 and to the right of the line r = 
sec ?
A. 
(4? - 3
)
B. 
(2? + 3
)
C. 
(2? - 3
)
D. 
?
Mathematics
Find the probability.A bag contains 19 balls numbered 1 through 19. What is the probability of selecting a ball that has an even number?
A. 9
B. 
C. 
D. 
Mathematics
Simplify the expression. All exponents should be positive integers.
-1
A. 
B. 
C. 
D. 
Mathematics
Write the prime factorization for the number.684
A. 2 ? 2 ? 3 ? 3 ? 19 B. 2 ? 2 ? 2 ? 3 ? 3 ? 19 C. 3 ? 3 ? 3 ? 3 ? 19 D. 2 ? 2 ? 2 ? 2 ? 19
Mathematics