Use the addition formulas to derive the identity.cos 
= -sin x
What will be an ideal response?
cos 
= cos x cos 
- sin x sin 
= cos x (0) - sin x (1)
= 0 - sin x
= -sin x
Mathematics
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Evaluate the exponential form.90
A. 1 B. -1 C. 9 D. 0
Mathematics
Evaluate the integral.
A. 
B. 
C. 
D. 100
Mathematics
Solve.A manufacturer of medical supplies produces 1-liter bags of saline solution. The cost to produce x thousand bags of saline is given by the cost function 
where C is the cost in thousands of dollars. Find the cost to produce 4000 bags of saline.
A. $4000 B. $53,600 C. $34,400 D. $4.00
Mathematics
Write interval notation for the graph.
A. (2, 6) B. [2, 6) C. [2, 6] D. (2, 6]
Mathematics