Express the product as a sum containing only sines or cosines.cos 
cos 
A. 
[cos(6?) - sin(4?)]
B. 
[cos(3?) - sin(2?)]
C. 
[cos(2?) + cos(3?)]
D. 
cos2(5?)
Answer: C
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Solve the problem.A rectangular swimming pool is being constructed, 18 feet long and 100 feet wide. The depth of the pool is measured at 3-foot intervals across the width of the pool. Estimate the volume of water in the pool using the Parabolic Rule.
A. 7700 ft3 B. 10,200 ft3 C. 5800 ft3 D. 8700 ft3
Find an exponential model for the following data set. Round your answer to two decimal places. t 0 2 4 6 y 3.07 3.71 4.49 5.43?
A. ?
B. ?
C. ?
D. 
Solve.Two ships leave a harbor together traveling on courses that have an angle of 128° between them. If they each travel 520 miles, how far apart are they (to the nearest mile)?
A. 456 mi B. 41 mi C. 1870 mi D. 935 mi
Identify the equation as a parabola, circle, ellipse, or hyperbola.(x - 4)2 = 16 - y2
A. Parabola B. Circle C. Hyperbola D. Ellipse