Complete the identity.sec4 ? - 2 sec2 ? tan2 ? + tan4 ? = ?
A. sec2 ? + tan2 ?
B. 2
C. sec2 ? (1 + tan2 ?)
D. 1
Answer: D
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A value of sinh x or cosh x is given. Use the definitions and the identity 
to find the value of the other indicated hyperbolic function.sinh x = 
, csch x =
A. - 
B. 
C. 
D. 
Solve the problem by writing an appropriate system of equations and using the inverse of the coefficient matrix to solve the system.The sum of three numbers is 13. The first, plus three times the second, plus the third, is 1. Two times the first, minus the second, plus the third, is 15. Which of the numbers are odd numbers?
A. 29 B. 29 and 7 C. -7 and -29 D. -7
Solve the problem.Suppose $2000 is deposited into an account earning 8% annual interest, compounded continuously. Find the balance in the account at the end of 4 years.
A. $2754.26 B. $2640.00 C. $2854.26 D. $2720.98
Simplify the expression.
4
A. 
B. 85
C. 3
D. 