Express the sum or difference as a product of sines and/or cosines.sin (7?) + sin (3?)
A. 2 sin (10?)
B. 2 sin (5?) cos (2?)
C. 2 cos (5?) sin (2?)
D. 2 sin (5?) sin (2?)
Answer: B
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Multiply.-3
(
+ 8)
A. -3y - 24
B. -3y + 
C. -3y + 24
D. -3
- 24y
Solve the differential equation.x 
= y + (x2 - 3)2
A. y = 
x3 - 6x - 
+ C
B. y = 
x4 - 6x2 - 9 + Cx
C. y = 
x4 - 18x ln x+ Cx
D. y = x4 - x2 - 9 + Cx
Solve the problem.Below is a floor plan of a suite of offices. Place a door in one of the rooms so that a security guard can enter by the door marked "enter", pass through each door and lock it behind him, and then exit by the door you have placed in the plan. 
A. Place door in room E. B. Place door in room D. C. Place door in room A. D. Place door in room B.
Represent each of the following situations with a signed number.The stock market average experienced a 26-point loss in one day.
A. +26 B. -26