Write the product as a sum or difference containing only sines or cosines.sin(5?) sin(8?)
A. 
[cos(13?) - sin(3?)]
B. 
[cos(3?) - cos(13?)]
C. sin2(40?2)
D. 
[- cos(3?) - cos(13?)]
Answer: B
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Solve.Mark the electrician charges $80 for a house call, and then $35 per hour for labor. Sara the electrician charges $65 for a house call, and then $45 per hour for labor. Graph the system to find the number of hours of electrical work that would be required for the two electricians to charge the same amount.
A. 1.5 hrs B. 2 hrs C. 1 hrs D. 0.5 hrs
Provide an appropriate response.If a square nut has a diagonal measure of 4 inches, what is the measure of each side? (Round answer to nearest tenth.)
Fill in the blank(s) with the appropriate word(s).
Remove grouping symbols and simplify.5c + 3(4c - 6) - 4(4c - 6) + 3c - 3
A. -16c + 3 B. 4c + 3 C. 4c - 15 D. -16c - 15
Determine whether there is a maximum or minimum value for the given function, and find that value.f(x) = -x2 - 18x - 83
A. Maximum: -2 B. Minimum: 2 C. Maximum: 2 D. Minimum: 0