Rewrite the expression in terms of exponentials and simplify the results.ln 
+ ln (cosh 2x + sinh 2x)
A. ln (e2x - e-9x)
B. 11x
C. -7
D. -7x
Answer: D
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Tell whether the statement is true or false.cos 67° = cos 13°cos 54° - sin 13°sin 54°
A. True B. False
Let x represent one number and let y represent the other number. Use the given conditions to write a system of nonlinear equations. Solve the system and find the numbers.The sum of the squares of two numbers is 85. The difference of the two numbers is 1. Find the two numbers.
A. -7 and -6 B. 6 and 7 C. -7 and -6; 6 and 7 D. -6 and 7; -7 and 6
Determine whether the improper integral is convergent or divergent.
A. Convergent B. Divergent
Find all cube roots of the complex number. Leave answers in trigonometric form.4 - 4i
A. 
cis 100°, 
cis 220°, 
cis 340°
B. 
cis 60°, 
cis 180°, 
cis 300°
C. 
cis 80°, 
cis 200°, 
cis 320°
D. 
cis 100°, 
cis 220°, 
cis 340°