Fill in the blank using the word product, sum, quotient, or difference.The formula sin ? sin ? = 
[cos (? - ?) - cos (? + ?)] can be used to change a 
of two sines into the 
of two cosine expressions.
A. quotient, difference
B. product, difference
C. product, sum
D. quotient, sum
Answer: B
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Solve the problem.A water tank is formed by revolving the curve y = 6x4 about the y-axis. Water drains from the tank through a small hole in the bottom of the tank. At what constant rate does the water level, y, fall? (Use Torricelli's Law: dV/dt = -m
.)
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = tan
A. y = tan u; u = ? - 
; 
= 
sec2
B. y = tan u; u = ? - 
; 
= sec2
C. y = tan u; u = ? - 
; 
= sec2
D. y = tan u; u = ? - 
; 
= 
sec
tan
Graph the ellipse and locate the foci.4x2 + 16y2 = 64
A. foci at (
, 0) and (-
, 0)
B. foci at (2
, 0) and (-2
, 0)
C. foci at (2
, 0) and (-2
, 0)
D. foci at (0, 2
) and (0, -2
)
Find the future value of the annuity. Round to the nearest cent.a1 = $100
I = 0.19
n = 13
A. $4524.45 B. $5050.76 C. $3718.02 D. $424.43