Solve the problem.On a Touch-Tone phone, each button produces a unique sound. The sound produced is the sum of two tones, given by y = sin (2?lt) and y = sin (2?ht)where l and h are the low and high frequencies (cycles per second) shown on the illustration.
The sound produced is thus given by y = sin (2?lt) + sin (2?ht)Write the sound emitted by touching the 5 key as a product of sines and cosines.
A. y = 2 sin(566?t) cos(2106?t)
B. y = 2 sin(2106?t) cos(566?t)
C. y = 2 sin(707?t) cos(2247?t)
D. y = 2 sin(2247?t) cos(707?t)
Answer: B
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Find the probability.When a pair of dice is rolled there are 36 different possible outcomes: 1-1, 1-2, ... 6-6. If a pair of dice is rolled 4 times, what is the probability of getting a sum of 5 every time?
A. 
B. 
C. 
D. 
Give the quadrant in which the point is located.(0, -8)
A. Quadrant IV B. Quadrant II C. None D. Quadrant III
Solve the problem.A rotating beacon is located 14 ft from a wall. If the distance from the beacon to the point on the wall where the beacon is aimed is given by a = 14|sec 2?t|,where t is in seconds, find a when t = 0.31 seconds. Round your answer to the nearest hundredth.
A. -38.03 ft B. 24.91 ft C. 31.47 ft D. 38.03 ft
Find all solutions to the equation. Express each result in radians.4 sin2 x - 1 = 0
A. 
+ n?, 
+ n?
B. 
+ n?
C. 
+ n?, 
+ n?
D. 
+ n?, 
+ 2n?