Express the product as a sum containing only sines or cosines.cos(2?) cos(6?)
A. 
[cos(4?) + cos(8?)]
B. cos2(8?2)
C. 
[cos(8?) - sin(4?)]
D. 
[cos(8?) - cos(4?)]
Answer: A
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Complete the following:(a) Write the equation in slope-intercept form.(b) Give the slope and y-intercept of the line.6x + 7y = 38
A. (a) y = - 
x + 
(b) - 
; 
B. (a) y = - 
x + 
(b) - 
; 
C. (a) y = 
x + 
(b) 
; 
D. (a) y = 
x + 
(b) 
; 
Solve the problem.Evaluate 
at (x, y, z) = (2, 2, 0) for the function u(p, q, r) = epq cos(r); p = 
, 
A. 0 B. 1 C. 4 D. 8
Translate to a system of two equations, then solve.How many liters of a 30% alcohol solution must be mixed with 40 liters of a 70% solution to get a 50% solution?
A. 8 L B. 4 L C. 80 L D. 40 L
Find the position vector for the vector having initial point P and terminal point Q.P = (0, 0, 0) and Q = (2, 3, -4)
A. v = -2i - 3j + 4k B. v = 2i + 3j - 4k C. v = 2i + 3j + 4k D. v = -4i + 3j + 2k