Express the product as a sum containing only sines or cosines.sin(4?) sin(7?)
A. 
[cos(3?) - cos(11?)]
B. 
[cos(11?) - sin(3?)]
C. sin2(28?2)
D. 
[- cos(3?) - cos(11?)]
Answer: A
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Decide whether or not the modulo system forms a group.{1, 2, 3, 4}; multiplication modulo 5
A. Not a group B. Group
Solve the problem.Does the graph of the function y = tan x - x have any horizontal tangents in the interval 
If so, where?
A. No
B. Yes, at x = ?
C. Yes, at x = 0, x = ?, x = 2?
D. Yes, at x = 
, x = 
Provide an appropriate response.Write as an algebraic expression: Half of y
Fill in the blank(s) with the appropriate word(s).
Use the REGRESSION feature on a graphing calculator.Efficiency experts rate employees according to job performance and attitude. The results for several randomly selected employees are given below.
Find the regression line which can be used to predict performance rating if attitude rating is known.
A. y = 92.3 - 0.669x B. y = 2.81 + 1.35x C. y = -47.3 + 2.02x D. y = 11.7 + 1.02x