Find the exact value by using a half-angle identity.cos 75°
A. 
B. - 
C. - 
D. 
Answer: D
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Identify the specified numbers.The rational numbers in the following list:1, 
, -12, 0, 
, 
, 0.78
A. 1, -12, 0, 
B. 1, -12, 0, 
, 
C. 1, -12, 0, 
, 
, 0.78
D. 
Provide an appropriate response.An investor purchased 150 shares of a stock at $15.80 per share. The investor holds the stock for 39 weeks and then sells the stock for $19.25 per share. Use the commission schedule for this company given below to find the annual rate of interest earned by this investor. Express your answer as a percentage, correct to one decimal place.PrincipleCommissionUnder $2500$25 + 1.6% of principle$2500 - $7500$38 + 1.1% of principleOver $7500$105 + 0.5% of principle
Fill in the blank(s) with the appropriate word(s).
Find the first term and the common ratio of the geometric sequence.56, 28, 14, 7, 3.5, . . .
A. a1 = 56, r = 3.5 B. a1 = 0.5, r = 2 C. a1 = 0.5, r = -0.5 D. a1 = 56, r = 0.5
Provide an appropriate response.Obtain the first nonzero term of the Maclaurin series for sin x - tan-1 x.
A. 
B. 
C. - 
D. 