Find the exact value by using a half-angle identity.cos 165°
A. 
B. - 
C. 
D. - 
Answer: B
Mathematics
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Use the product rule to simplify the expression. Assume that the variables can be any real number.
A. (x + y)6/5 B. (x + y)5/6 C. (x5 + y5)1/6 D. (x6 + y6)1/5
Mathematics
Determine whether the sequence is geometric. If so, find the common ratio. –3, –6, –12, –24,...
a. –2
b. 
c. 2
d. not geometric
Mathematics
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. $2640.00 B. $2720.98 C. $2754.26 D. $2854.26
Mathematics
If 
, 
, 
then 
_____.
A. 1.1 B. 0.55 C. 0.85 D. 0.10
Mathematics