Solve the problem.Two low-frequency sound waves with similar frequencies, producing the pressures 
and 
combine to form a pressure 
The variable t is time measured in seconds. Graph P in 
by 
and use the graph to determine the
frequency of the displayed beats. Rewrite the sum P as a product of trigonometric functions.
A. 1.5 beats per second
0.006 cos(61.5?t) cos(1.5?t)
[0, 1.2, .05] by [-0.01, 0.01, 0.001]
B. no beats
0.006 cos(123?t) cos(123?t)
[0, 1.2, .05] by [-0.01, 0.01, 0.001]
C. no beats
0.006 cos(61.5?t) cos(61.5?t)
[0, 1.2, .05] by [-0.01, 0.01, 0.001]
D. 3 beats per second
0.006 cos(123?t) cos(3?t)
[0, 1.2, .05] by [-0.01, 0.01, 0.001]
Answer: D
You might also like to view...
Solve the formula for the indicated variable.r = 
for V
A. V = 
B. V = 3?r2h
C. V = 
D. V = 
Solve the problem.The diagonal of the floor of a rectangular office cubicle is 2 ft longer than the length of the cubicle and 5 ft longer than twice the width. Find the dimensions of the cubicle. Round to the nearest tenth, if necessary.
A. width = 3.9 ft, length = 9.7 ft B. width = 9.7 ft, length = 22.4 ft C. width = 2 ft, length = 9 ft D. width = 4 ft, length = 11 ft
Perform the operation and reduce to lowest terms.
× 
× 
A. 
B. 
C. 
D. 
Write a slope-intercept equation for a line with the given characteristics.m = - 
, passes through (2, 5)
A. y = - 
x + 
B. y = - 
x - 
C. y = 
x - 
D. y = - 
x - 